diff --git a/Lib/collections/abc.py b/Lib/collections/abc.py
index 6e908bd..c80c7dd 100644
--- a/Lib/collections/abc.py
+++ b/Lib/collections/abc.py
@@ -596,6 +596,13 @@
     def append(self, value):
         self.insert(len(self), value)
 
+    def clear(self):
+        try:
+            while True:
+                self.pop()
+        except IndexError:
+            pass
+
     def reverse(self):
         n = len(self)
         for i in range(n//2):