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Trim moustache and compete for the film (5)

Ross

I believe the answer is:

movie

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'the film' is the definition.
(synonyms)

'trim moustache and compete' is the wordplay.
'trim moustache' becomes 'mo' (I can't justify this - if you can you should believe this answer much more).
'and' says to put letters next to each other.
'compete' becomes 'vie' (synonyms).
'mo'+'vie'='MOVIE'

'for' is the link.

Can you help me to learn more?

(Other definitions for movie that I've seen before include "picture" , "provide entertainment" , "one screened" , "Gladiator for one" , "Cinema film (mainly US)" .)

I've seen this clue in the Sydney Morning Herald.
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