Cryptozoological beast (4)
I believe the answer is:
yeti
'cryptozoological beast' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for yeti that I've seen before include "whose existence is unconfirmed" , "highland inhabitant" , "creature awaiting discovery?" , "Feared creature" , "Anthropoid cryptid" .)