Power: film actor (6)
I believe the answer is:
player
'actor' is the definition.
('player' can be a synonym of 'actor')
'power film' is the wordplay.
I cannot quite see how this works, but
'power' could be 'p' and 'p' is found within the answer.
'film' could be 'layer' (I've seen this before) and 'layer' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for player that I've seen before include "Participant in sport or game" , "South African golfer, Gary" , "Gamer or sportsman" , "Actor - musician" , "Actor; sportsman" .)