Simple wind instrument (7)
I believe the answer is:
ocarina
'simple wind 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 "music-maker" , "Toy flute" , "Old wind instrument" , "Inca oar made into a musical instrument" , "Wind instrument with a mouthpiece and finger holes" .)