Not use these clothes enough? (9)
I believe the answer is:
underwear
'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" .)