Frederick , composer of 1907 opera A Village Romeo and Juliet (6)
I believe the answer is:
delius
(Other definitions for delius that I've seen before include "English orchestral composer, d. 1934" , "The Walk to the Paradise Garden composer" , "Frederick -, composer of Sea Drift, Appalachia" , "Frederick -, nature-inspired Eng. composer" , "Frederick -, Brigg Fair composer" .)