Wasted singular legwear (6)

I believe the answer is:

tights

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'wasted singular' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

I can't explain the rest of the clue.

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(Other definitions for tights that I've seen before include "Types of stockings" , "Woman's garment" , "Women's garments" , "Leg-wear for women" , "Close fitting garment" .)

I've seen this clue in The Independent.

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