Carrot-nosed "Frozen” character (4)

I believe the answer is:

olaf

(Other definitions for olaf that I've seen before include "King --, cantata by Elgar" , "St ---, Norwegian king" , "Man's name; foal (anag.)" , "Name of five kings of Norway" , "Name of five Norwegian kings" .)

I've seen this clue in The Wall Street Journal.

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