Look awfully large (5)
I believe the answer is:
glare
'look' is the definition.
(glare is a kind of look)
'awfully large' is the wordplay.
'awfully' indicates anagramming the letters.
'large' anagrammed gives 'GLARE'.
(Other definitions for glare that I've seen before include "fierce look" , "Large (anag.)" , "Stare fiercely - 5 down (anag)" , "Glower" , "Angry look" .)