Crossword Genius

Vehement cheat's in US it turned out (12)

Ross

I believe the answer is:

enthusiastic

'vehement' is the definition.
(thesaurus)

'cheat's in us it turned out' is the wordplay.
'turned out' indicates anagramming the letters.
'cheats'+'in'+'us'+'it'='cheatsinusit'
'cheatsinusit' anagrammed gives 'ENTHUSIASTIC'.

(Other definitions for enthusiastic that I've seen before include "Showing keen interest" , "Highly keen" , "Full of fervour" , "Eager" , "warm" .)

I've seen this clue in The Telegraph.
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