City in Czechoslovakia (4)

I believe the answer is:

oslo

'city' is the definition.
(capital of Norway)

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

(Other definitions for oslo that I've seen before include "Solo in Norway?" , "Go solo to European capital" , "Former Christiania" , "Location" , "City in Norway" .)

I've seen this clue in the Newsday, The Telegraph and The Mirror.

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