diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst
index ccdf5027ff9841..47f824488f5bf1 100644
--- a/Doc/library/signal.rst
+++ b/Doc/library/signal.rst
@@ -270,7 +270,7 @@ The variables defined in the :mod:`signal` module are:
    All the signal numbers are defined symbolically.  For example, the hangup signal
    is defined as :const:`signal.SIGHUP`; the variable names are identical to the
    names used in C programs, as found in ``<signal.h>``.  The Unix man page for
-   ':c:func:`signal`' lists the existing signals (on some systems this is
+   '``signal``' lists the existing signals (on some systems this is
    :manpage:`signal(2)`, on others the list is in :manpage:`signal(7)`). Note that
    not all systems define the same set of signal names; only those names defined by
    the system are defined by this module.
@@ -666,9 +666,8 @@ The :mod:`signal` module defines the following functions:
    *sigset*.
 
    The return value is an object representing the data contained in the
-   :c:type:`siginfo_t` structure, namely: :attr:`si_signo`, :attr:`si_code`,
-   :attr:`si_errno`, :attr:`si_pid`, :attr:`si_uid`, :attr:`si_status`,
-   :attr:`si_band`.
+   ``siginfo_t`` structure, namely: ``si_signo``, ``si_code``,
+   ``si_errno``, ``si_pid``, ``si_uid``, ``si_status``, ``si_band``.
 
    .. availability:: Unix.
 
diff --git a/Doc/tools/.nitignore b/Doc/tools/.nitignore
index 657d720e766179..60a80fe2c72a72 100644
--- a/Doc/tools/.nitignore
+++ b/Doc/tools/.nitignore
@@ -29,7 +29,6 @@ Doc/library/profile.rst
 Doc/library/pyexpat.rst
 Doc/library/resource.rst
 Doc/library/select.rst
-Doc/library/signal.rst
 Doc/library/smtplib.rst
 Doc/library/socket.rst
 Doc/library/ssl.rst
diff --git a/Include/internal/pycore_tuple.h b/Include/internal/pycore_tuple.h
index be1961cbf77a2d..46db02593ad106 100644
--- a/Include/internal/pycore_tuple.h
+++ b/Include/internal/pycore_tuple.h
@@ -23,9 +23,6 @@ extern PyStatus _PyTuple_InitGlobalObjects(PyInterpreterState *);
 
 #define _PyTuple_ITEMS(op) _Py_RVALUE(_PyTuple_CAST(op)->ob_item)
 
-// Alias for backward compatibility
-#define _PyTuple_FromArray PyTuple_FromArray
-
 PyAPI_FUNC(PyObject *)_PyTuple_FromStackRefStealOnSuccess(const union _PyStackRef *, Py_ssize_t);
 PyAPI_FUNC(PyObject *)_PyTuple_FromArraySteal(PyObject *const *, Py_ssize_t);
 
diff --git a/Lib/os.py b/Lib/os.py
index 710d6f8cfcdf74..328d13c303b580 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -58,6 +58,11 @@ def _get_exports_list(module):
         __all__.append('_exit')
     except ImportError:
         pass
+    try:
+        from posix import _clearenv
+        __all__.append('_clearenv')
+    except ImportError:
+        pass
     import posixpath as path
 
     try:
@@ -768,6 +773,12 @@ def __ror__(self, other):
         new.update(self)
         return new
 
+    if _exists("_clearenv"):
+        def clear(self):
+            _clearenv()
+            self._data.clear()
+
+
 def _create_environ_mapping():
     if name == 'nt':
         # Where Env Var Names Must Be UPPERCASE
diff --git a/Lib/test/clinic.test.c b/Lib/test/clinic.test.c
index ed9058899c0523..4729708efd3acb 100644
--- a/Lib/test/clinic.test.c
+++ b/Lib/test/clinic.test.c
@@ -4341,7 +4341,7 @@ test_vararg_and_posonly(PyObject *module, PyObject *const *args, Py_ssize_t narg
         goto exit;
     }
     a = args[0];
-    __clinic_args = _PyTuple_FromArray(args + 1, nargs - 1);
+    __clinic_args = PyTuple_FromArray(args + 1, nargs - 1);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -4356,7 +4356,7 @@ test_vararg_and_posonly(PyObject *module, PyObject *const *args, Py_ssize_t narg
 
 static PyObject *
 test_vararg_and_posonly_impl(PyObject *module, PyObject *a, PyObject *args)
-/*[clinic end generated code: output=0c11c475e240869e input=2c49a482f68545c0]*/
+/*[clinic end generated code: output=83cbe9554d04add2 input=2c49a482f68545c0]*/
 
 /*[clinic input]
 test_vararg
@@ -4421,7 +4421,7 @@ test_vararg(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
     }
     a = fastargs[0];
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -4437,7 +4437,7 @@ test_vararg(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
 
 static PyObject *
 test_vararg_impl(PyObject *module, PyObject *a, PyObject *args)
-/*[clinic end generated code: output=17ba625cdd0369c1 input=7448995636d9186a]*/
+/*[clinic end generated code: output=d773f7b54e61f73a input=7448995636d9186a]*/
 
 /*[clinic input]
 test_vararg_with_default
@@ -4514,7 +4514,7 @@ test_vararg_with_default(PyObject *module, PyObject *const *args, Py_ssize_t nar
     }
 skip_optional_kwonly:
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -4531,7 +4531,7 @@ test_vararg_with_default(PyObject *module, PyObject *const *args, Py_ssize_t nar
 static PyObject *
 test_vararg_with_default_impl(PyObject *module, PyObject *a, PyObject *args,
                               int b)
-/*[clinic end generated code: output=3f2b06ab08d5d0be input=3a0f9f557ce1f712]*/
+/*[clinic end generated code: output=d25e56802c197344 input=3a0f9f557ce1f712]*/
 
 /*[clinic input]
 test_vararg_with_only_defaults
@@ -4612,7 +4612,7 @@ test_vararg_with_only_defaults(PyObject *module, PyObject *const *args, Py_ssize
     }
     c = fastargs[1];
 skip_optional_kwonly:
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -4628,7 +4628,7 @@ test_vararg_with_only_defaults(PyObject *module, PyObject *const *args, Py_ssize
 static PyObject *
 test_vararg_with_only_defaults_impl(PyObject *module, PyObject *args, int b,
                                     PyObject *c)
-/*[clinic end generated code: output=f46666f0b1bf86b9 input=6983e66817f82924]*/
+/*[clinic end generated code: output=7366943a7df42e05 input=6983e66817f82924]*/
 
 /*[clinic input]
 test_paramname_module
diff --git a/Lib/test/test_os/test_os.py b/Lib/test/test_os/test_os.py
index e074858fe2ad99..86880a6d281315 100644
--- a/Lib/test/test_os/test_os.py
+++ b/Lib/test/test_os/test_os.py
@@ -1494,6 +1494,14 @@ def test_reload_environ(self):
             self.assertNotIn(b'test_env', os.environb)
             self.assertNotIn('test_env', os.environ)
 
+    def test_clearenv(self):
+        os.environ['REMOVEME'] = '1'
+        os.environ.clear()
+        self.assertEqual(os.environ, {})
+
+        self.assertRaises(TypeError, os.environ.clear, None)
+
+
 class WalkTests(unittest.TestCase):
     """Tests for os.walk()."""
     is_fwalk = False
diff --git a/Misc/NEWS.d/next/Library/2025-10-11-20-03-13.gh-issue-139482.du2Stg.rst b/Misc/NEWS.d/next/Library/2025-10-11-20-03-13.gh-issue-139482.du2Stg.rst
new file mode 100644
index 00000000000000..4edd3d238bf2d9
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-10-11-20-03-13.gh-issue-139482.du2Stg.rst
@@ -0,0 +1,3 @@
+Optimize :data:`os.environ.clear() <os.environ>` by calling
+:manpage:`clearenv(3)` when this function is available.
+Patch by Victor Stinner.
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 1fa44ef1de4e09..4b75e455f402ff 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -937,7 +937,7 @@ newPySSLSocket(PySSLContext *sslctx, PySocketSockObject *sock,
     }
 
     /* bpo43522 and OpenSSL < 1.1.1l: copy hostflags manually */
-#if OPENSSL_VERSION < 0x101010cf
+#if OPENSSL_VERSION_NUMBER < 0x101010cf
     X509_VERIFY_PARAM *ssl_verification_params = SSL_get0_param(self->ssl);
     X509_VERIFY_PARAM *ssl_ctx_verification_params = SSL_CTX_get0_param(ctx);
 
diff --git a/Modules/_testclinic.c b/Modules/_testclinic.c
index 5c196c0dd0fb01..890f2201b46bc0 100644
--- a/Modules/_testclinic.c
+++ b/Modules/_testclinic.c
@@ -63,7 +63,7 @@ pack_arguments_2pos_varpos(PyObject *a, PyObject *b,
                            PyObject * const *args, Py_ssize_t args_length)
 /*[clinic end generated code: output=267032f41bd039cc input=86ee3064b7853e86]*/
 {
-    PyObject *tuple = _PyTuple_FromArray(args, args_length);
+    PyObject *tuple = PyTuple_FromArray(args, args_length);
     if (tuple == NULL) {
         return NULL;
     }
@@ -1174,7 +1174,7 @@ varpos_array_impl(PyObject *module, PyObject * const *args,
                   Py_ssize_t args_length)
 /*[clinic end generated code: output=a25f42f39c9b13ad input=97b8bdcf87e019c7]*/
 {
-    return _PyTuple_FromArray(args, args_length);
+    return PyTuple_FromArray(args, args_length);
 }
 
 
@@ -1610,7 +1610,7 @@ _testclinic_TestClass_varpos_array_no_fastcall_impl(PyTypeObject *type,
                                                     Py_ssize_t args_length)
 /*[clinic end generated code: output=27c9da663e942617 input=9ba5ae1f1eb58777]*/
 {
-    return _PyTuple_FromArray(args, args_length);
+    return PyTuple_FromArray(args, args_length);
 }
 
 
diff --git a/Modules/clinic/_testclinic.c.h b/Modules/clinic/_testclinic.c.h
index 7e971f7ad7324c..9bcd0eeb008142 100644
--- a/Modules/clinic/_testclinic.c.h
+++ b/Modules/clinic/_testclinic.c.h
@@ -9,7 +9,7 @@ preserve
 #include "pycore_long.h"          // _PyLong_UnsignedShort_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 #include "pycore_runtime.h"       // _Py_ID()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
+#include "pycore_tuple.h"         // _PyTuple_ITEMS()
 
 PyDoc_STRVAR(test_empty_function__doc__,
 "test_empty_function($module, /)\n"
@@ -2764,7 +2764,7 @@ varpos(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     PyObject *return_value = NULL;
     PyObject *__clinic_args = NULL;
 
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -2802,7 +2802,7 @@ posonly_varpos(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     }
     a = args[0];
     b = args[1];
-    __clinic_args = _PyTuple_FromArray(args + 2, nargs - 2);
+    __clinic_args = PyTuple_FromArray(args + 2, nargs - 2);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -2845,7 +2845,7 @@ posonly_req_opt_varpos(PyObject *module, PyObject *const *args, Py_ssize_t nargs
     b = args[1];
 skip_optional:
     __clinic_args = nargs > 2
-        ? _PyTuple_FromArray(args + 2, nargs - 2)
+        ? PyTuple_FromArray(args + 2, nargs - 2)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -2916,7 +2916,7 @@ posonly_poskw_varpos(PyObject *module, PyObject *const *args, Py_ssize_t nargs,
     a = fastargs[0];
     b = fastargs[1];
     __clinic_args = nargs > 2
-        ? _PyTuple_FromArray(args + 2, nargs - 2)
+        ? PyTuple_FromArray(args + 2, nargs - 2)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -2984,7 +2984,7 @@ poskw_varpos(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
     }
     a = fastargs[0];
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -3063,7 +3063,7 @@ poskw_varpos_kwonly_opt(PyObject *module, PyObject *const *args, Py_ssize_t narg
     }
 skip_optional_kwonly:
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -3146,7 +3146,7 @@ poskw_varpos_kwonly_opt2(PyObject *module, PyObject *const *args, Py_ssize_t nar
     c = fastargs[2];
 skip_optional_kwonly:
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -3218,7 +3218,7 @@ varpos_kwonly_opt(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyO
     }
     b = fastargs[0];
 skip_optional_kwonly:
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -3299,7 +3299,7 @@ varpos_kwonly_req_opt(PyObject *module, PyObject *const *args, Py_ssize_t nargs,
     }
     c = fastargs[2];
 skip_optional_kwonly:
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -3549,7 +3549,7 @@ gh_32092_oob(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
     kw2 = fastargs[3];
 skip_optional_kwonly:
     varargs = nargs > 2
-        ? _PyTuple_FromArray(args + 2, nargs - 2)
+        ? PyTuple_FromArray(args + 2, nargs - 2)
         : PyTuple_New(0);
     if (varargs == NULL) {
         goto exit;
@@ -3626,7 +3626,7 @@ gh_32092_kw_pass(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyOb
     kw = fastargs[1];
 skip_optional_kwonly:
     __clinic_args = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (__clinic_args == NULL) {
         goto exit;
@@ -3658,7 +3658,7 @@ gh_99233_refcount(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     PyObject *return_value = NULL;
     PyObject *__clinic_args = NULL;
 
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -3771,7 +3771,7 @@ null_or_tuple_for_varargs(PyObject *module, PyObject *const *args, Py_ssize_t na
     }
 skip_optional_kwonly:
     constraints = nargs > 1
-        ? _PyTuple_FromArray(args + 1, nargs - 1)
+        ? PyTuple_FromArray(args + 1, nargs - 1)
         : PyTuple_New(0);
     if (constraints == NULL) {
         goto exit;
@@ -4174,7 +4174,7 @@ _testclinic_TestClass_defclass_varpos(PyObject *self, PyTypeObject *cls, PyObjec
     if (!fastargs) {
         goto exit;
     }
-    __clinic_args = _PyTuple_FromArray(args, nargs);
+    __clinic_args = PyTuple_FromArray(args, nargs);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -4231,7 +4231,7 @@ _testclinic_TestClass_defclass_posonly_varpos(PyObject *self, PyTypeObject *cls,
     }
     a = fastargs[0];
     b = fastargs[1];
-    __clinic_args = _PyTuple_FromArray(args + 2, nargs - 2);
+    __clinic_args = PyTuple_FromArray(args + 2, nargs - 2);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -4600,4 +4600,4 @@ _testclinic_TestClass_posonly_poskw_varpos_array_no_fastcall(PyObject *type, PyO
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=0764e6f8c9d94057 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=290d2e346ea7bfa1 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/_testclinic_depr.c.h b/Modules/clinic/_testclinic_depr.c.h
index a46d238801b321..e2db4fd87ed26b 100644
--- a/Modules/clinic/_testclinic_depr.c.h
+++ b/Modules/clinic/_testclinic_depr.c.h
@@ -9,7 +9,7 @@ preserve
 #include "pycore_long.h"          // _PyLong_UnsignedShort_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 #include "pycore_runtime.h"       // _Py_ID()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
+#include "pycore_tuple.h"         // _PyTuple_ITEMS()
 
 PyDoc_STRVAR(depr_star_new__doc__,
 "DeprStarNew(a=None)\n"
@@ -2474,4 +2474,4 @@ depr_multi(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=4e60af44fd6b7b94 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=2231bec0ed196830 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/_testclinic_kwds.c.h b/Modules/clinic/_testclinic_kwds.c.h
index e2fd4d9f3b4591..86cad50c56cf55 100644
--- a/Modules/clinic/_testclinic_kwds.c.h
+++ b/Modules/clinic/_testclinic_kwds.c.h
@@ -9,7 +9,7 @@ preserve
 #include "pycore_long.h"          // _PyLong_UnsignedShort_Converter()
 #include "pycore_modsupport.h"    // _PyArg_CheckPositional()
 #include "pycore_runtime.h"       // _Py_ID()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
+#include "pycore_tuple.h"         // _PyTuple_ITEMS()
 
 PyDoc_STRVAR(lone_kwds__doc__,
 "lone_kwds($module, /, **kwds)\n"
@@ -181,4 +181,4 @@ kwds_with_pos_only_and_stararg(PyObject *module, PyObject *args, PyObject *kwarg
 
     return return_value;
 }
-/*[clinic end generated code: output=e4dea1070e003f5d input=a9049054013a1b77]*/
+/*[clinic end generated code: output=3e5251b10aa44382 input=a9049054013a1b77]*/
diff --git a/Modules/clinic/gcmodule.c.h b/Modules/clinic/gcmodule.c.h
index 53ff9e4faf8b7c..08275e35413f66 100644
--- a/Modules/clinic/gcmodule.c.h
+++ b/Modules/clinic/gcmodule.c.h
@@ -8,7 +8,6 @@ preserve
 #endif
 #include "pycore_abstract.h"      // _Py_convert_optional_to_ssize_t()
 #include "pycore_modsupport.h"    // _PyArg_UnpackKeywords()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 PyDoc_STRVAR(gc_enable__doc__,
 "enable($module, /)\n"
@@ -324,7 +323,7 @@ gc_get_referrers(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     PyObject *return_value = NULL;
     PyObject *objs = NULL;
 
-    objs = _PyTuple_FromArray(args, nargs);
+    objs = PyTuple_FromArray(args, nargs);
     if (objs == NULL) {
         goto exit;
     }
@@ -355,7 +354,7 @@ gc_get_referents(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
     PyObject *return_value = NULL;
     PyObject *objs = NULL;
 
-    objs = _PyTuple_FromArray(args, nargs);
+    objs = PyTuple_FromArray(args, nargs);
     if (objs == NULL) {
         goto exit;
     }
@@ -584,4 +583,4 @@ gc_get_freeze_count(PyObject *module, PyObject *Py_UNUSED(ignored))
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=96d057eac558e6ca input=a9049054013a1b77]*/
+/*[clinic end generated code: output=19738854607938db input=a9049054013a1b77]*/
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index 3d9863ad179d3c..71f87ac8ec7cf4 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -9539,6 +9539,27 @@ os_unsetenv(PyObject *module, PyObject *arg)
 
 #endif /* !defined(MS_WINDOWS) */
 
+#if defined(HAVE_CLEARENV)
+
+PyDoc_STRVAR(os__clearenv__doc__,
+"_clearenv($module, /)\n"
+"--\n"
+"\n");
+
+#define OS__CLEARENV_METHODDEF    \
+    {"_clearenv", (PyCFunction)os__clearenv, METH_NOARGS, os__clearenv__doc__},
+
+static PyObject *
+os__clearenv_impl(PyObject *module);
+
+static PyObject *
+os__clearenv(PyObject *module, PyObject *Py_UNUSED(ignored))
+{
+    return os__clearenv_impl(module);
+}
+
+#endif /* defined(HAVE_CLEARENV) */
+
 PyDoc_STRVAR(os_strerror__doc__,
 "strerror($module, code, /)\n"
 "--\n"
@@ -13292,6 +13313,10 @@ os__emscripten_log(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
     #define OS_UNSETENV_METHODDEF
 #endif /* !defined(OS_UNSETENV_METHODDEF) */
 
+#ifndef OS__CLEARENV_METHODDEF
+    #define OS__CLEARENV_METHODDEF
+#endif /* !defined(OS__CLEARENV_METHODDEF) */
+
 #ifndef OS_WCOREDUMP_METHODDEF
     #define OS_WCOREDUMP_METHODDEF
 #endif /* !defined(OS_WCOREDUMP_METHODDEF) */
@@ -13447,4 +13472,4 @@ os__emscripten_log(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
 #ifndef OS__EMSCRIPTEN_LOG_METHODDEF
     #define OS__EMSCRIPTEN_LOG_METHODDEF
 #endif /* !defined(OS__EMSCRIPTEN_LOG_METHODDEF) */
-/*[clinic end generated code: output=47ace1528820858b input=a9049054013a1b77]*/
+/*[clinic end generated code: output=67f0df7cd5a7de20 input=a9049054013a1b77]*/
diff --git a/Modules/gcmodule.c b/Modules/gcmodule.c
index 19b3f2a2eb6147..8a8c728428343c 100644
--- a/Modules/gcmodule.c
+++ b/Modules/gcmodule.c
@@ -8,7 +8,6 @@
 #include "pycore_gc.h"
 #include "pycore_object.h"      // _PyObject_IS_GC()
 #include "pycore_pystate.h"     // _PyInterpreterState_GET()
-#include "pycore_tuple.h"       // _PyTuple_FromArray()
 
 typedef struct _gc_runtime_state GCState;
 
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 5d2506f48e31b4..60ef6f9ff4cd98 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -2131,7 +2131,7 @@ product_next_lock_held(PyObject *op)
         /* Copy the previous result tuple or re-use it if available */
         if (Py_REFCNT(result) > 1) {
             PyObject *old_result = result;
-            result = _PyTuple_FromArray(_PyTuple_ITEMS(old_result), npools);
+            result = PyTuple_FromArray(_PyTuple_ITEMS(old_result), npools);
             if (result == NULL)
                 goto empty;
             lz->result = result;
@@ -2366,7 +2366,7 @@ combinations_next_lock_held(PyObject *op)
         /* Copy the previous result tuple or re-use it if available */
         if (Py_REFCNT(result) > 1) {
             PyObject *old_result = result;
-            result = _PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
+            result = PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
             if (result == NULL)
                 goto empty;
             co->result = result;
@@ -2620,7 +2620,7 @@ cwr_next(PyObject *op)
         /* Copy the previous result tuple or re-use it if available */
         if (Py_REFCNT(result) > 1) {
             PyObject *old_result = result;
-            result = _PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
+            result = PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
             if (result == NULL)
                 goto empty;
             co->result = result;
@@ -2881,7 +2881,7 @@ permutations_next(PyObject *op)
         /* Copy the previous result tuple or re-use it if available */
         if (Py_REFCNT(result) > 1) {
             PyObject *old_result = result;
-            result = _PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
+            result = PyTuple_FromArray(_PyTuple_ITEMS(old_result), r);
             if (result == NULL)
                 goto empty;
             po->result = result;
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 8278902cbeb349..38ddc3ec4ffc3d 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -13201,6 +13201,25 @@ os_unsetenv_impl(PyObject *module, PyObject *name)
 #endif /* !MS_WINDOWS */
 
 
+#ifdef HAVE_CLEARENV
+/*[clinic input]
+os._clearenv
+[clinic start generated code]*/
+
+static PyObject *
+os__clearenv_impl(PyObject *module)
+/*[clinic end generated code: output=2d6705d62c014b51 input=47d2fa7f323c43ca]*/
+{
+    errno = 0;
+    int err = clearenv();
+    if (err) {
+        return posix_error();
+    }
+    Py_RETURN_NONE;
+}
+#endif
+
+
 /*[clinic input]
 os.strerror
 
@@ -17167,6 +17186,7 @@ static PyMethodDef posix_methods[] = {
     OS_POSIX_FADVISE_METHODDEF
     OS_PUTENV_METHODDEF
     OS_UNSETENV_METHODDEF
+    OS__CLEARENV_METHODDEF
     OS_STRERROR_METHODDEF
     OS_FCHDIR_METHODDEF
     OS_FSYNC_METHODDEF
diff --git a/Objects/call.c b/Objects/call.c
index c9a18bcc3da60b..bd8617825b585e 100644
--- a/Objects/call.c
+++ b/Objects/call.c
@@ -213,7 +213,7 @@ _PyObject_MakeTpCall(PyThreadState *tstate, PyObject *callable,
         return NULL;
     }
 
-    PyObject *argstuple = _PyTuple_FromArray(args, nargs);
+    PyObject *argstuple = PyTuple_FromArray(args, nargs);
     if (argstuple == NULL) {
         return NULL;
     }
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
index 06a81a4fdbd865..5ac4fbd812924c 100644
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -313,7 +313,7 @@ method_vectorcall_VARARGS(
     if (method_check_args(func, args, nargs, kwnames)) {
         return NULL;
     }
-    PyObject *argstuple = _PyTuple_FromArray(args+1, nargs-1);
+    PyObject *argstuple = PyTuple_FromArray(args+1, nargs-1);
     if (argstuple == NULL) {
         return NULL;
     }
@@ -338,7 +338,7 @@ method_vectorcall_VARARGS_KEYWORDS(
     if (method_check_args(func, args, nargs, NULL)) {
         return NULL;
     }
-    PyObject *argstuple = _PyTuple_FromArray(args+1, nargs-1);
+    PyObject *argstuple = PyTuple_FromArray(args+1, nargs-1);
     if (argstuple == NULL) {
         return NULL;
     }
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index 531ee48eaf8a24..244d8f39e2bae5 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -13,7 +13,6 @@
 #include "pycore_modsupport.h"    // _PyArg_NoKeywords()
 #include "pycore_object.h"
 #include "pycore_pyerrors.h"      // struct _PyErr_SetRaisedException
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include "osdefs.h"               // SEP
 #include "clinic/exceptions.c.h"
@@ -119,7 +118,7 @@ BaseException_vectorcall(PyObject *type_obj, PyObject * const*args,
     self->context = NULL;
     self->suppress_context = 0;
 
-    self->args = _PyTuple_FromArray(args, PyVectorcall_NARGS(nargsf));
+    self->args = PyTuple_FromArray(args, PyVectorcall_NARGS(nargsf));
     if (!self->args) {
         Py_DECREF(self);
         return NULL;
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 5905a6d335b311..b2903e5c93ee9f 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -6,16 +6,16 @@
 #include "pycore_critical_section.h"  // _Py_CRITICAL_SECTION_ASSERT_OBJECT_LOCKED()
 #include "pycore_dict.h"          // _PyDictViewObject
 #include "pycore_freelist.h"      // _Py_FREELIST_FREE(), _Py_FREELIST_POP()
-#include "pycore_pyatomic_ft_wrappers.h"
 #include "pycore_interp.h"        // PyInterpreterState.list
 #include "pycore_list.h"          // struct _Py_list_freelist, _PyListIterObject
 #include "pycore_long.h"          // _PyLong_DigitCount
 #include "pycore_modsupport.h"    // _PyArg_NoKwnames()
 #include "pycore_object.h"        // _PyObject_GC_TRACK(), _PyDebugAllocatorStats()
+#include "pycore_pyatomic_ft_wrappers.h"
+#include "pycore_setobject.h"     // _PySet_NextEntry()
 #include "pycore_stackref.h"      // _Py_TryIncrefCompareStackRef()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
+#include "pycore_tuple.h"         // _PyTuple_FromArraySteal()
 #include "pycore_typeobject.h"    // _Py_TYPE_VERSION_LIST
-#include "pycore_setobject.h"     // _PySet_NextEntry()
 #include <stddef.h>
 
 /*[clinic input]
@@ -3221,7 +3221,7 @@ PyList_AsTuple(PyObject *v)
     PyObject *ret;
     PyListObject *self = (PyListObject *)v;
     Py_BEGIN_CRITICAL_SECTION(self);
-    ret = _PyTuple_FromArray(self->ob_item, Py_SIZE(v));
+    ret = PyTuple_FromArray(self->ob_item, Py_SIZE(v));
     Py_END_CRITICAL_SECTION();
     return ret;
 }
diff --git a/Objects/structseq.c b/Objects/structseq.c
index c05bcde24c441b..7a159338b9ba8a 100644
--- a/Objects/structseq.c
+++ b/Objects/structseq.c
@@ -12,7 +12,7 @@
 #include "pycore_modsupport.h"    // _PyArg_NoPositional()
 #include "pycore_object.h"        // _PyObject_GC_TRACK()
 #include "pycore_structseq.h"     // PyStructSequence_InitType()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
+#include "pycore_tuple.h"         // _PyTuple_RESET_HASH_CACHE()
 #include "pycore_typeobject.h"    // _PyStaticType_FiniBuiltin()
 
 static const char visible_length_key[] = "n_sequence_fields";
@@ -353,7 +353,7 @@ structseq_reduce(PyObject *op, PyObject *Py_UNUSED(ignored))
     if (n_unnamed_fields < 0) {
         return NULL;
     }
-    tup = _PyTuple_FromArray(self->ob_item, n_visible_fields);
+    tup = PyTuple_FromArray(self->ob_item, n_visible_fields);
     if (!tup)
         goto error;
 
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 1fa4bae638a1fe..94b7ae7e642283 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -438,7 +438,7 @@ tuple_slice(PyTupleObject *a, Py_ssize_t ilow,
     if (ilow == 0 && ihigh == Py_SIZE(a) && PyTuple_CheckExact(a)) {
         return Py_NewRef(a);
     }
-    return _PyTuple_FromArray(a->ob_item + ilow, ihigh - ilow);
+    return PyTuple_FromArray(a->ob_item + ilow, ihigh - ilow);
 }
 
 PyObject *
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index a67bf9b1c5337b..d4549b70d4dabc 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -56,7 +56,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include "pycore_pyhash.h"        // _Py_HashSecret_t
 #include "pycore_pylifecycle.h"   // _Py_SetFileSystemEncoding()
 #include "pycore_pystate.h"       // _PyInterpreterState_GET()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 #include "pycore_ucnhash.h"       // _PyUnicode_Name_CAPI
 #include "pycore_unicodeobject.h" // struct _Py_unicode_state
 #include "pycore_unicodeobject_generated.h"  // _PyUnicode_InitStaticStrings()
@@ -14494,7 +14493,7 @@ unicode_vectorcall(PyObject *type, PyObject *const *args,
     Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
     if (kwnames != NULL && PyTuple_GET_SIZE(kwnames) != 0) {
         // Fallback to unicode_new()
-        PyObject *tuple = _PyTuple_FromArray(args, nargs);
+        PyObject *tuple = PyTuple_FromArray(args, nargs);
         if (tuple == NULL) {
             return NULL;
         }
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 2551c2c961b643..64249177eec5f2 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -3,6 +3,7 @@
 #include "Python.h"
 #include "pycore_ast.h"           // _PyAST_Validate()
 #include "pycore_call.h"          // _PyObject_CallNoArgs()
+#include "pycore_cell.h"          // PyCell_GetRef()
 #include "pycore_ceval.h"         // _PyEval_Vector()
 #include "pycore_compile.h"       // _PyAST_Compile()
 #include "pycore_fileutils.h"     // _PyFile_Flush
@@ -14,8 +15,7 @@
 #include "pycore_pyerrors.h"      // _PyErr_NoMemory()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_pythonrun.h"     // _Py_SourceAsString()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
-#include "pycore_cell.h"          // PyCell_GetRef()
+#include "pycore_tuple.h"         // _PyTuple_Recycle()
 
 #include "clinic/bltinmodule.c.h"
 
@@ -123,7 +123,7 @@ builtin___build_class__(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
                         "__build_class__: name is not a string");
         return NULL;
     }
-    orig_bases = _PyTuple_FromArray(args + 2, nargs - 2);
+    orig_bases = PyTuple_FromArray(args + 2, nargs - 2);
     if (orig_bases == NULL)
         return NULL;
 
diff --git a/Python/ceval.c b/Python/ceval.c
index 1b52128c858ecb..f48f412fab8335 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -2011,7 +2011,7 @@ PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals,
 {
     PyThreadState *tstate = _PyThreadState_GET();
     PyObject *res = NULL;
-    PyObject *defaults = _PyTuple_FromArray(defs, defcount);
+    PyObject *defaults = PyTuple_FromArray(defs, defcount);
     if (defaults == NULL) {
         return NULL;
     }
diff --git a/Python/clinic/sysmodule.c.h b/Python/clinic/sysmodule.c.h
index a47e4d11b54441..4c4a86de2f99bd 100644
--- a/Python/clinic/sysmodule.c.h
+++ b/Python/clinic/sysmodule.c.h
@@ -7,7 +7,6 @@ preserve
 #  include "pycore_runtime.h"     // _Py_ID()
 #endif
 #include "pycore_modsupport.h"    // _PyArg_UnpackKeywords()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 PyDoc_STRVAR(sys_addaudithook__doc__,
 "addaudithook($module, /, hook)\n"
@@ -102,7 +101,7 @@ sys_audit(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
         PyErr_SetString(PyExc_ValueError, "embedded null character");
         goto exit;
     }
-    __clinic_args = _PyTuple_FromArray(args + 1, nargs - 1);
+    __clinic_args = PyTuple_FromArray(args + 1, nargs - 1);
     if (__clinic_args == NULL) {
         goto exit;
     }
@@ -1948,4 +1947,4 @@ _jit_is_active(PyObject *module, PyObject *Py_UNUSED(ignored))
 #ifndef SYS_GETANDROIDAPILEVEL_METHODDEF
     #define SYS_GETANDROIDAPILEVEL_METHODDEF
 #endif /* !defined(SYS_GETANDROIDAPILEVEL_METHODDEF) */
-/*[clinic end generated code: output=449d16326e69dcf6 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=5f7d84c5bf00d557 input=a9049054013a1b77]*/
diff --git a/Python/intrinsics.c b/Python/intrinsics.c
index 8ea920e690cd0d..9cfc285c6a5925 100644
--- a/Python/intrinsics.c
+++ b/Python/intrinsics.c
@@ -9,7 +9,6 @@
 #include "pycore_intrinsics.h"    // INTRINSIC_PRINT
 #include "pycore_pyerrors.h"      // _PyErr_SetString()
 #include "pycore_runtime.h"       // _Py_ID()
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 #include "pycore_typevarobject.h" // _Py_make_typevar()
 #include "pycore_unicodeobject.h" // _PyUnicode_FromASCII()
 
@@ -192,7 +191,7 @@ static PyObject *
 list_to_tuple(PyThreadState* unused, PyObject *v)
 {
     assert(PyList_Check(v));
-    return _PyTuple_FromArray(((PyListObject *)v)->ob_item, Py_SIZE(v));
+    return PyTuple_FromArray(((PyListObject *)v)->ob_item, Py_SIZE(v));
 }
 
 static PyObject *
diff --git a/Python/optimizer.c b/Python/optimizer.c
index 7b76cddeabff44..83b0b1a5deba5c 100644
--- a/Python/optimizer.c
+++ b/Python/optimizer.c
@@ -14,7 +14,7 @@
 #include "pycore_opcode_utils.h"  // MAX_REAL_OPCODE
 #include "pycore_optimizer.h"     // _Py_uop_analyze_and_optimize()
 #include "pycore_pystate.h"       // _PyInterpreterState_GET()
-#include "pycore_tuple.h" // _PyTuple_FromArraySteal
+#include "pycore_tuple.h"         // _PyTuple_FromArraySteal
 #include "pycore_unicodeobject.h" // _PyUnicode_FromASCII
 #include "pycore_uop_ids.h"
 #include "pycore_jit.h"
diff --git a/Python/optimizer_symbols.c b/Python/optimizer_symbols.c
index 0e6884b99232e9..01cff0b014cc7b 100644
--- a/Python/optimizer_symbols.c
+++ b/Python/optimizer_symbols.c
@@ -7,7 +7,6 @@
 #include "pycore_long.h"
 #include "pycore_optimizer.h"
 #include "pycore_stats.h"
-#include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include <stdbool.h>
 #include <stdint.h>
@@ -1044,7 +1043,7 @@ _Py_uop_symbols_test(PyObject *Py_UNUSED(self), PyObject *Py_UNUSED(ignored))
         "tuple item does not match value used to create tuple"
     );
     PyObject *pair[2] = { val_42, val_43 };
-    tuple = _PyTuple_FromArray(pair, 2);
+    tuple = PyTuple_FromArray(pair, 2);
     ref = _Py_uop_sym_new_const(ctx, tuple);
     TEST_PREDICATE(
         _Py_uop_sym_get_const(ctx, _Py_uop_sym_tuple_getitem(ctx, ref, 1)) == val_43,
diff --git a/Tools/clinic/libclinic/converters.py b/Tools/clinic/libclinic/converters.py
index 201125b9165e74..bc21ae84e1c332 100644
--- a/Tools/clinic/libclinic/converters.py
+++ b/Tools/clinic/libclinic/converters.py
@@ -1266,13 +1266,12 @@ def parse_vararg(self, *, pos_only: int, min_pos: int, max_pos: int,
                     }}}}
                     """
             else:
-                self.add_include('pycore_tuple.h', '_PyTuple_FromArray()')
                 start = f'args + {max_pos}' if max_pos else 'args'
                 size = f'nargs - {max_pos}' if max_pos else 'nargs'
                 if min(pos_only, min_pos) < max_pos:
                     return f"""
                         {paramname} = nargs > {max_pos}
-                            ? _PyTuple_FromArray({start}, {size})
+                            ? PyTuple_FromArray({start}, {size})
                             : PyTuple_New(0);
                         if ({paramname} == NULL) {{{{
                             goto exit;
@@ -1280,7 +1279,7 @@ def parse_vararg(self, *, pos_only: int, min_pos: int, max_pos: int,
                         """
                 else:
                     return f"""
-                        {paramname} = _PyTuple_FromArray({start}, {size});
+                        {paramname} = PyTuple_FromArray({start}, {size});
                         if ({paramname} == NULL) {{{{
                             goto exit;
                         }}}}
diff --git a/configure b/configure
index d80340e3015bee..211f84399064a0 100755
--- a/configure
+++ b/configure
@@ -19225,6 +19225,12 @@ if test "x$ac_cv_func_chown" = xyes
 then :
   printf "%s\n" "#define HAVE_CHOWN 1" >>confdefs.h
 
+fi
+ac_fn_c_check_func "$LINENO" "clearenv" "ac_cv_func_clearenv"
+if test "x$ac_cv_func_clearenv" = xyes
+then :
+  printf "%s\n" "#define HAVE_CLEARENV 1" >>confdefs.h
+
 fi
 ac_fn_c_check_func "$LINENO" "clock" "ac_cv_func_clock"
 if test "x$ac_cv_func_clock" = xyes
diff --git a/configure.ac b/configure.ac
index 1e0c0f71b7c281..35bf153a8987b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5226,7 +5226,8 @@ fi
 
 # checks for library functions
 AC_CHECK_FUNCS([ \
-  accept4 alarm bind_textdomain_codeset chmod chown clock closefrom close_range confstr \
+  accept4 alarm bind_textdomain_codeset chmod chown clearenv \
+  clock closefrom close_range confstr \
   copy_file_range ctermid dladdr dup dup3 execv explicit_bzero explicit_memset \
   faccessat fchmod fchmodat fchown fchownat fdopendir fdwalk fexecve \
   fork fork1 fpathconf fstatat ftime ftruncate futimens futimes futimesat \
@@ -8173,7 +8174,7 @@ PY_STDLIB_MOD([xxlimited_35], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_d
 
 # Determine JIT stencils header files based on target platform
 JIT_STENCILS_H=""
-AS_VAR_IF([enable_experimental_jit], [no], 
+AS_VAR_IF([enable_experimental_jit], [no],
   [],
   [case "$host" in
     aarch64-apple-darwin*)
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 60bff4a9f26356..72870411bc086a 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -141,6 +141,9 @@
 /* Define if you have the 'chroot' function. */
 #undef HAVE_CHROOT
 
+/* Define to 1 if you have the 'clearenv' function. */
+#undef HAVE_CLEARENV
+
 /* Define to 1 if you have the 'clock' function. */
 #undef HAVE_CLOCK