Egg-shaped instrument (7)
I believe the answer is:
ocarina
'egg-shaped instrument' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ocarina that I've seen before include "Primitive wind instrument" , "Terracotta wind instrument" , "Egg-shaped wind instrument with finger holes" , "music-maker" , "Old wind instrument" .)