Musical orphan (5)
I believe the answer is:
annie
'musical orphan' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for annie that I've seen before include "Little Ophan .....; also a musical" , "girl instructed to get gun" , "Cartoon strip orphan" , "Musical inspired by comic strip" , "Musical about markswoman" .)