Patching damaged item of sleepwear (8)
I believe the answer is:
nightcap
'item of sleepwear' is the definition.
I can't judge whether this defines the answer.
'patching damaged' is the wordplay.
'damaged' is an anagram indicator.
'patching' anagrammed gives 'NIGHTCAP'.
Can you help me to learn more?
(Other definitions for nightcap that I've seen before include "attire" , "A drink before bed, probably alcoholic" , "Patching (anag.)" , "Bedtime tipple" , "Tot, at bedtime" .)