In favour of disco becoming rhythmical (8)

I believe the answer is:

prosodic

'rhythmical' is the definition.
(thesaurus)

'in favour of disco becoming' is the wordplay.
'in favour of' becomes 'pro' (I've seen this before).
'becoming' indicates anagramming the letters.
'disco' with letters rearranged gives 'sodic'.
'pro'+'sodic'='PROSODIC'

I've seen this clue in The Telegraph.

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