Holmenkollen Ski Festival city (4)

I believe the answer is:

oslo

(Other definitions for oslo that I've seen before include "It's capital in Anglos London" , "Go solo to European capital" , "European capital in go-slow" , "European capital, known until 1924 as Christiania" , "Capital in throes of go-slow" .)

I've seen this clue in the USA Today.

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