Crossword Genius

Not use these clothes enough? (9)

Ross

I believe the answer is:

underwear

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'these clothes enough?' is the definition.
The definition suggests an adverb but the answer is not.

'not use' is the wordplay.
'not' becomes 'under' (I can't explain this - if you can you should give a lot more credence to this answer).
'use' becomes 'wear' (I've seen this in another clue).
'under'+'wear'='UNDERWEAR'

Can you help me to learn more?

(Other definitions for underwear that I've seen before include "Combinations, say" , "Clothing nearest the skin" , "Lingerie" , "Vest, pants etc" , "Nether garments" .)

I've seen this clue in The Guardian.
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