Sort of film you and I back (7)
I believe the answer is:
western
'sort of film' is the definition.
'you and i back' is the wordplay.
'you and i' becomes 'we'.
'back' becomes 'stern' (I've seen this before).
'we'+'stern'='WESTERN'
(Other definitions for western that I've seen before include "The Occident" , "Spaghetti film?" , "Type of film or music" , "Old film genre, horse opera" , "Cowboy film of occidental origin" .)