That Enigmatic English composer (5)
I believe the answer is:
elgar
'english composer' is the definition.
(Edward Elgar, 1857-1934)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for elgar that I've seen before include "[NIMROD] 's creator" , "The 18 [APOSTLES] creator" , "13 composer, 1857-1934" , "Composer of Pomp and Circumstance marches, d. 1934" , "Enigma Variations composer" .)