Tibetan bovine (3)
I believe the answer is:
yak
'tibetan bovine' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yak that I've seen before include "Tibetan creature" , "Natter" , "Long-haired ox of central Asia" , "Long-haired ox of SE Asia" , "Long haired ox of central Asia" .)