Take off bits, half naked, rising (7)
I believe the answer is:
unstrap
'take off' is the definition.
(thesaurus)
'bits half naked rising' is the wordplay.
'bits' becomes 'parts' (I've seen this before).
'half naked' becomes 'nu' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rising' shows that the letters should be reversed in order (going up in a down clue).
'parts'+'nu'='partsnu'
'partsnu' in reverse letter order is 'UNSTRAP'.
Can you help me to learn more?
(Other definitions for unstrap that I've seen before include "Loosen tie" , "loose" , "Remove fastenings from" , "Release" .)