Scandinavian part of Czechoslovakia (4)

I believe the answer is:

oslo

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'scandinavian part' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'of czechoslovakia' is the wordplay.
'of' says the answer is hidden in the clue.
'OSLO' is hidden within 'czechoslovakia'.

Can you help me to learn more?

(Other definitions for oslo that I've seen before include "Nordic city" , "Capital often frozen" , "Capital of Norway" , "Scandinavian port" , "Solo in Norway?" .)

I've seen this clue in the Evening Standard.

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