Lionel Bart musical (6)
I believe the answer is:
oliver
'lionel bart musical' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oliver that I've seen before include "Orphan recruited by criminal gang" , "Dickens boy named Twist" , "Character in Dickens" , "First name of Dickens boy Twist" , "-- Reed, actor" .)