Hawaiian guitar (7)
I believe the answer is:
ukulele
'hawaiian guitar' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ukulele that I've seen before include "Eek - Lulu! (anag)" , "Small guitar as played by George Formby" , "One needs pluck in this" , "Small Hawaiian guitar" , "Small, four-stringed guitar" .)