The movie we back (7)

I believe the answer is:

western

'the movie' is the definition.
(Western is an example)

'we back' is the wordplay.
'back' becomes 'stern' (I've seen this before).
'we'+'stern'='WESTERN'

(Other definitions for western that I've seen before include "Spaghetti film?" , "Old film genre, horse opera" , "Type of film or music" , "direction?" , "Cowboy film of occidental origin" .)

I've seen this clue in the Evening Standard.

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