Huge mines exploding around me (7)
I believe the answer is:
immense
'huge' is the definition.
(I know that huge can be written as immense)
'mines exploding around me' is the wordplay.
'exploding' indicates anagramming the letters.
'around' indicates putting letters inside.
'mines' anagrammed gives 'imnse'.
'imnse' going around 'me' is 'IMMENSE'.
(Other definitions for immense that I've seen before include "Jumbo" , "Mammoth" , "Vast or enormous" , "Massive" , "'Vast, colossal (7)'" .)