Actor-songwriter Novello (4)
I believe the answer is:
ivor
'actor-songwriter novello' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ivor that I've seen before include "--- Gurney, Novello" , "Cutler who was entertainingly eccentric" , "Welsh actor, composer, singer" , "- Novello, writer of Keep the Home Fires Burning" , "-- Novello, composer and actor" .)