Are they needed for a saucy play? (8)

I believe the answer is:

dressers

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'are they' is the definition.
The definition suggests a plural noun which matches the answer.

I cannot understand how the remainder of the clue works.

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(Other definitions for dressers that I've seen before include "ones employed backstage" , "Wardrobe assistants" , "They are found in theatres and in kitchens" , "Chests of drawers" , "Sideboards" .)

I've seen this clue in the Evening Standard.

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