Animals' jaws (7)
I believe the answer is:
rabbits
This clue is a double definition.
'animals'' is the first definition.
(rabbits are animals)
'jaws' is the second definition.
(both can mean to chat or talk)
(Other definitions for rabbits that I've seen before include "timid people" , "waffles" , "Inferior golfers" , "Burrowing animals" , "Warren residents" .)