The Beatles' Starr (5)
I believe the answer is:
ringo
'the beatles' starr' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ringo that I've seen before include "Starr drummer" , "Beatles drummer" , "One of The Beatles" , "The drumming Beatle" , "Member of group" .)