Home of Norway's Royal Palace (4)
I believe the answer is:
oslo
'home of norway's royal palace' 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 "European capital in go-slow" , "foreign port" , "Scandinavian city" , "Capital in throes of go-slow" , "Capital of Norway" .)