Crossword Genius

Too slow to reveal capital? (4)

Ross

I believe the answer is:

oslo

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

'too slow to reveal' is the wordplay.
'to reveal' indicates a hidden word.
'OSLO' can be found hidden inside 'too slow'.

(Other definitions for oslo that I've seen before include "Capital of Norway" , "where Ibsen lived under another name" , "Norwegian chief port" , "Norwegian capital" , "Northern capital of Czechoslovakia?" .)

I've seen this clue in the Sydney Morning Herald.
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