Norway's most famous writer of notes (5)
I believe the answer is:
grieg
'norway's most' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'norway' relates to this answer.
'famous writer of notes' is the wordplay.
'famous writer of' becomes 'gri' (I can't justify this - if you can you should give a lot more credence to this answer).
'notes' becomes 'eg' (two musical notes).
'gri'+'eg'='GRIEG'
Can you help me to learn more?
(Other definitions for grieg that I've seen before include "Edvard ---, composer" , "Composer of incidental music to Peer Gynt, d.1907" , "Composer of the incidental music for Ibsen's Peer Gynt" , "Norwegian composer (Peer Gynt)" , "Scandinavian composer, d. 1907" .)