Long film got abridged for release (3,2)
I believe the answer is:
let go
'release' is the definition.
(synonyms)
'long film got abridged' is the wordplay.
'long' becomes 'l'.
'film' becomes 'ET' (E.T. the Extra-Terrestrial).
'abridged' means to remove the last letter.
'got' with its final letter taken away is 'go'.
'l'+'et'+'go'='LET GO'
'for' acts as a link.
(Other definitions for let go that I've seen before include "Give up" , "Stop holding" , "Set at liberty, loose grip on" , "Release - relax one's grasp" , "Discuss no further - dismiss - release" .)