Biblical hunter who shares his name with a piece from Elgar's Enigma Variations (6)
I believe the answer is:
nimrod
(Other definitions for nimrod that I've seen before include "Elgar Enigma variation; D minor (anag.)" , "OT hunter" , "'Mighty Biblical ruler, builder of the Tower of Babel (6)'" , "One of Elgar's Enigma Variations" , "Antarctic summit" .)