Relative harm after undressing in the dark (7)
I believe the answer is:
unclear
'the dark' is the definition.
(thesaurus)
'relative harm after undressing' is the wordplay.
I cannot really understand how this works, but
'relative' could be 'uncle' (uncle is a kind of relative) and 'uncle' is found within the answer.
The remaining letters 'ar' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for unclear that I've seen before include "Ill-defined or not easily understood" , "hard to understand" , "Indistinct" , "Imprecise, hazy" , "in clouds?" .)