What sounds like the central group stays (6)

I believe the answer is:

corset

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'stays' is the definition.
(stays can refer to a corset)

I don't understand how the rest of the clue works.

(Other definitions for corset that I've seen before include "Tight bodice" , "Type of bodice" , "female garment!" , "Close-fitting foundation garment" , "Stiff supportive undergarment" .)

I've seen this clue in The Independent.

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