Solo composition, Norwegian (4)
I believe the answer is:
oslo
'norwegian' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'solo composition' is the wordplay.
'composition' is an anagram indicator.
'solo' with letters rearranged gives 'OSLO'.
Can you help me to learn more?
(Other definitions for oslo that I've seen before include "Norwegian capital" , "Former Christiania" , "European capital in go-slow" , "City in Norway" , "Northern city" .)