Souvenir of chaps in feminist movement briefly (7)
I believe the answer is:
memento
'souvenir' is the definition.
(I know that souvenir can be written as memento)
'chaps in feminist movement briefly' is the wordplay.
'chaps' becomes 'men' (chap can mean a man).
'in' means one lot of letters goes inside another.
'feminist movement' becomes 'MeToo' (the Me Too movement).
'briefly' means to remove the last letter.
'metoo' with its last letter taken away is 'meto'.
'men' put into 'meto' is 'MEMENTO'.
'of' is the link.
(Other definitions for memento that I've seen before include "Something kept" , "This reminds" , "Object kept as a souvenir" , "Reminder of a person or event" , "Reminder that death is inevitable" .)