Goose sound (4)
I believe the answer is:
honk
'goose sound' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for honk that I've seen before include "Cry of the wild goose" , "Cry of a goose - sound of a horn" , "Toot one's horn" , "Toot of a horn - cry of a goose - smell nasty" .)