Film one omnivorous creature (5)

I believe the answer is:

coati

'omnivorous creature' is the definition.

'film one' is the wordplay.
'film' becomes 'coat' (I've seen this in other clues).
'one' becomes 'i' (Roman numeral).
'coat'+'i'='COATI'

(Other definitions for coati that I've seen before include "Flesh-eating mammal" , "consumer of flesh" , "Racoon-like omnivorous creature of Central and South America" , "Kind of raccoon" , "S. and Central American raccoon-like animal" .)

I've seen this clue in The Telegraph.

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