The abominable snowman (4)
I believe the answer is:
yeti
'the abominable snowman' 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 "Himalayan mystery" , "He's never had a successful Catcher" , "strange creature" , "Possibly a hairy creature" , "It's fantastic being" .)