Guitar cousin (5)
I believe the answer is:
sitar
'guitar cousin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sitar that I've seen before include "Stringed instrument of the subcontinent" , "instrument out east" , "Indian string instrument" , "Astir with Indian long-necked lute" , "Long necked and often plucked" .)