One going around naked? It's a turn-off (8)
I believe the answer is:
naturist
'one going around naked?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'it's a turn-off' is the wordplay.
'off' indicates anagramming the letters.
'its'+'a'+'turn'='itsaturn'
'itsaturn' anagrammed gives 'NATURIST'.
Can you help me to learn more?
(Other definitions for naturist that I've seen before include "One practising nudism for reasons of health or religion" , "One who goes naked" , "One exposed" , "One abandoning clothes" , "one barely feeling comfortable" .)