Hell of a blaze! (7)
I believe the answer is:
inferno
I believe this is a double definition.
'hell' is the first definition.
('inferno' can be a synonym of 'hell')
'a blaze' is the second definition.
(thesaurus)
'of' is the link.
(Other definitions for inferno that I've seen before include "Hellish conflagration" , "Large uncontrolled fire" , "Dante's scene of horror" , "Huge fire" , "Dante's Hell" .)