Hautboy (4)
I believe the answer is:
oboe
'hautboy' is the definition.
(I know that hautboy can be written as oboe)
This is the entire clue.
(Other definitions for oboe that I've seen before include "Double-reeded woodwind instrument" , "source of notes" , "Reed instrument" , "Woodwind instrument of treble pitch" , "bit of wind" .)