Musical with nude inside adult entertainment (8)
I believe the answer is:
cabarets
'adult entertainment' is the definition.
Although both the answer and 'entertainment' are nouns, they are not in the same form of the noun.
'musical with nude' is the wordplay.
'musical' becomes 'cats' (Andrew Lloyd Webber musical).
'with' indicates putting letters inside.
'nude' becomes 'bare' (synonyms).
'cats' enclosing 'bare' is 'CABARETS'.
'inside' acts as a link.
Can you help me to learn more?
(Other definitions for cabarets that I've seen before include "Entertainments in nightclubs" , "Floorshows in restaurants and nightclubs" , "Nightclubs with entertainment" .)