"Hallelujah Chorus” composer (6)
I believe the answer is:
handel
'hallelujah chorus composer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for handel that I've seen before include "German composer of Messiah" , "Anglo-German composer" , "British composer of German birth, the 'father of the oratorio'" , "George Frideric --, composer" , "German composer, lived in England" .)