Musical animals (4)
I believe the answer is:
cats
This clue is a double definition.
'musical' is the first definition.
(Andrew Lloyd Webber musical)
'animals' is the second definition.
(cats are animals)
(Other definitions for cats that I've seen before include "Carnivores - stage musical" , "Musical; animals" , "Famous feline Lloyd Webber musical" , "Musical; jazz fans" , "Popular musical" .)