The capital of Norway (4)

I believe the answer is:

oslo

'the capital of norway' is the definition.
(synonyms)

This is all the clue.

(Other definitions for oslo that I've seen before include "Capital in throes of go-slow" , "Nordic city" , "European capital city (found in Czechoslovakia!)" , "Northern city" , "Northern capital of Czechoslovakia?" .)

I've seen this clue in The Independent and The Guardian.

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