Lead singer of U2 (4)
I believe the answer is:
bono
'lead singer of u2' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bono that I've seen before include "Famous singer in famous band" , "U2's star vocalist" , "U2's main singer and lyricist" , "Singer in a leading band" , "Pro . . . . publico - for the common good" .)