Norwegian style of loaf (4)

I believe the answer is:

olaf

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'norwegian style' is the definition.
The definition suggests a singular noun which matches the answer.

'of loaf' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'loaf' is an anagram of 'OLAF'.

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

I've seen this clue in the Evening Standard.

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