Kennel sound (3)
I believe the answer is:
yap
'kennel sound' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yap that I've seen before include "Shrill bark; talk at length" , "Shrill bark; wage reversed" , "Gab" , "Bark like a tiny dog - speak constantly" , "Talk foolishly" .)