Film actor quietly leaves (5)
I believe the answer is:
layer
'film' is the definition.
(film can mean a thin layer of something)
'actor quietly leaves' is the wordplay.
'actor' becomes 'player' (synonyms).
'quietly' becomes 'p' (p for piano and quiet).
'leaves' is a deletion indicator.
'player' with 'p' taken away is 'LAYER'.
(Other definitions for layer that I've seen before include "Single thickness and hen" , "Bed - hen" , "Hen, perhaps" , "One producing eggs" , "Thin sheet - productive hen" .)