Lloyd Webber musical mainly featuring naked floor show (7)
I believe the answer is:
cabaret
'floor show' is the definition.
(synonyms)
'lloyd webber musical mainly featuring naked' is the wordplay.
'lloyd webber musical' becomes 'cats' (I've seen this before).
'mainly' means to remove the last letter.
'featuring' indicates putting letters inside.
'naked' becomes 'bare' (synonyms).
'cats' with its final letter removed is 'cat'.
'cat' going around 'bare' is 'CABARET'.
(Other definitions for cabaret that I've seen before include "Film set in 1931 Berlin - floor show" , "Bear cat (anag.)" , "Stage show" , "Nightclub 12ac" , "Nightclub entertainment, floor show" .)