Mythical Himalayan beast (4)
I believe the answer is:
yeti
'mythical himalayan beast' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for yeti that I've seen before include "Hairy recluse" , "highland inhabitant" , "mythical monster!" , "The Abominable Snowman in Tibetan" , "Tibetan creature" .)