Film second struggle (5)
I believe the answer is:
movie
'film' is the definition.
('movie' can be a synonym of 'film')
'second struggle' is the wordplay.
'second' becomes 'mo' (both are short periods of time).
'struggle' becomes 'vie' (I've seen this before).
'mo'+'vie'='MOVIE'
(Other definitions for movie that I've seen before include "Gladiator for one" , "one screened" , "Cinema production" , "provide entertainment" , "Flick" .)