Ovine utterance (3)
I believe the answer is:
baa
'ovine utterance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for baa that I've seen before include "Sound of a lamb" , "Statement from those flocking" , "Cry of a sheep" , "Lamb's cry" , "Sound from a ewe" .)