Explosive mix of Deity and Man (8)
I believe the answer is:
dynamite
'explosive' is the definition.
(dynamite is an explosive)
'mix of deity and man' is the wordplay.
'mix of' is an anagram indicator.
'and' means one lot of letters go next to another.
'deity' after 'man' is 'mandeity'.
'mandeity' anagrammed gives 'DYNAMITE'.
(Other definitions for dynamite that I've seen before include "Exciting person - explosive" , "Blast" , "Nitroglycerine explosive" , "Spectacular (or dangerous) person (or thing)" , "Nobel's invention" .)