Pear-shaped instrument (4)
I believe the answer is:
lute
'pear-shaped instrument' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lute that I've seen before include "Subject to drugs" , "Old stringed instrument with a pear-shaped body" , "Plucked, pear-shaped instrument" , "Elizabethan stringed instrument" , "Ancient stringed instrument" .)