Bearer of good moos? (3)
I believe the answer is:
cow
'bearer of good moos?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cow that I've seen before include "Overawe" , "Subdue with threats or force" , "Intimidate; quadruped" , "Female seal" , "Intimidate; an animal" .)