Ancient instrument (4)
I believe the answer is:
lute
'ancient instrument' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lute that I've seen before include "Subject to drugs" , "Plucked instrument; a sealant" , "Stringed instrument shaped like a halved egg" , "Old guitar-like instrument played by minstrels" , "Old musical instrument" .)