Riviera club MCs transformed my business (14)

I believe the answer is:

cruciverbalism

'my business' is the definition.
(cruciverbalism means the hobby of crosswords)

'riviera club mcs transformed' is the wordplay.
'transformed' indicates an anagram.
'riviera'+'club'+'mcs'='rivieraclubmcs'
'rivieraclubmcs' anagrammed gives 'CRUCIVERBALISM'.

I've seen this clue in The Times.

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