Capital by a fjord (4)
I believe the answer is:
oslo
'capital by a fjord' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oslo that I've seen before include "It's capital in Anglos London" , "Capital city, called Kristiania until 1924" , "Nordic capital" , "Capital often frozen" , "City in Norway" .)