U2 guitarist (with "the") (4)
I believe the answer is:
edge
'u2 guitarist with the' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for edge that I've seen before include "'Margin, rim (4)'" , "Force" , "Sharp ridge" , "Guitarist with U2" , "Move furtively; intense quality" .)