British composer (5)
I believe the answer is:
elgar
'british composer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elgar that I've seen before include "Glare strangely at the English composer" , "He scored" , "Enigma Variations composer" , "Out of the strange glare comes an English composer" , "Nimrod composer" .)