Five leaving movement removed souvenir (7)
I believe the answer is:
memento
'souvenir' is the definition.
('memento' can be a synonym of 'souvenir')
'five leaving movement removed' is the wordplay.
'five' becomes 'v' ('V' can be a synonym of 'five').
'leaving' is a deletion indicator.
'removed' indicates anagramming the letters (moved again).
'movement' with 'v' removed is 'moement'.
'moement' anagrammed gives 'MEMENTO'.
(Other definitions for memento that I've seen before include "Souvenir, reminder of past events" , "Souvenir, reminder of past event" , "trophy" , "Reminder of a person or event" , "A reminder of death - . . . . . . . mori" .)