Music icon knighted in 2003 (6)
I believe the answer is:
jagger
'music icon knighted in 2003' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for jagger that I've seen before include "Mick . . . . . . Rolling Stones singer" , "Mick --, Rolling Stone" , "English rock star" .)