"Frozen" snowman (4)
I believe the answer is:
olaf
'frozen snowman' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for olaf that I've seen before include "St ---, Norwegian king" , "King --, cantata by Elgar" , "Name of five Norwegian kings" , "Man's name; foal (anag.)" , "Name of five kings of Norway" .)