Part of one's costume for a dance (6)

I believe the answer is:

bolero

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'for a dance' is the definition.
(bolero is a kind of dance)

I don't understand the rest of the clue.

(Other definitions for bolero that I've seen before include "Short jacket or music for Spanish dance" , "Arrange to rob Leo during the dance" , "short jacket is required here" , "Spanish dance - item of clothing" , "Maurice Ravel's most famous work" .)

I've seen this clue in the Evening Standard.

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