Good man shattered in a grenade explosion (4)
I believe the answer is:
dean
'good man' is the definition.
'Dean' can be an answer for 'man'. I'm not sure about the 'good' bit.
'shattered in a grenade explosion' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is found within the answer.
The remaining letters 'de' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for dean that I've seen before include "Ice dancer" , "James ..., film star famous for his moody rebellious roles" , "College official" , "James ..., film actor" , "Small valley - cathedral dignitary" .)