Angry look from Elgar? (5)
I believe the answer is:
glare
'angry look' is the definition.
(I've seen this before)
'from elgar?' is the wordplay.
'from' indicates an anagram (from the letters).
'elgar' with letters rearranged gives 'GLARE'.
(Other definitions for glare that I've seen before include "Too-bright light" , "Large (anag.)" , "fierce look" , "Stare fiercely - 5 down (anag)" , "Shine intensely" .)