Incensed because grenade exploded (7)
I believe the answer is:
angered
'incensed' is the definition.
(I've seen this in another clue)
'grenade exploded' is the wordplay.
'exploded' indicates anagramming the letters.
'grenade' is an anagram of 'ANGERED'.
'because' acts as a link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for angered that I've seen before include "In high dudgeon" , "En garde (anag.)" , "Very annoyed" , "Enraged (anag)" , "Infuriated" .)