Himalayan ox (3)
I believe the answer is:
yak
'himalayan ox' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for yak that I've seen before include "A long-haired Asian ox" , "Bos grunniens" , "Talk persistently" , "one sporting a thick coat" , "Large long-haired ox" .)