Drive back to see film about power (5)
I believe the answer is:
repel
'drive back' is the definition.
(synonyms)
'film about power' is the wordplay.
'film' becomes 'reel' (reel is a kind of film).
'about' means one lot of letters goes inside another.
'power' becomes 'p' (symbol in physics).
'reel' going around 'p' is 'REPEL'.
'to see' acts as a link.
(Other definitions for repel that I've seen before include "Turn away" , "Drive back like leper" , "Put off - disgust" , "Reject" , "Hold off" .)