Not a single tango necessitates nine performers (5)

I believe the answer is:

nonet

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'necessitates nine performers' is the definition.
I can't tell whether this definition defines the answer.

'not a single tango' is the wordplay.
'not a single' becomes 'none' (not one).
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'none'+'t'='NONET'

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(Other definitions for nonet that I've seen before include "small band" , "Work for nine players" , "Music for nine instruments or voices" , "Ennead" , "Instrumental group of nine players" .)

I've seen this clue in the Evening Standard.

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