Numbers racket? Discloses suspect (8,7)

I believe the answer is:

cocktail dresses

'numbers' is the definition.
(number can mean an item of clothing)

'racket? discloses suspect' is the wordplay.
'suspect' indicates anagramming the letters (a suspicious or unusual spelling).
'racket'+'discloses'='racketdiscloses'
'racketdiscloses' is an anagram of 'COCKTAIL DRESSES'.

I've seen this clue in The Guardian.

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