Not very musical group fronting Oscars (4,3)

I believe the answer is:

none too

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'not' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'musical group fronting oscars' is the wordplay.
'musical group' becomes 'nonet' (group of nine musicians).
'fronting' is a charade indicator (letters next to each other).
'oscars' becomes 'OO' (two O's - Oscar is O in the phonetic alphabet).
'nonet'+'oo'='NONE TOO'

'very' acts as a link.

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I've seen this clue in The Times.

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