Musical with Rum Tum Tugger and Mungojerrie (4)
I believe the answer is:
cats
'musical with rum tum tugger and mungojerrie' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cats that I've seen before include "Carnivores - stage musical" , "Domestic pets" , "Feline mammals" , "Musical from TS Eliot" , "Pets - musical" .)