Musical set at the Kit Kat Klub (7)
I believe the answer is:
cabaret
'musical set at the kit kat klub' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cabaret that I've seen before include "Series of acts" , "Film set in 1931 Berlin - floor show" , "Entertainment at night club" , "Evening entertainment as in nightclub" , "Bear cat (anag.)" .)