Report of an explosive nature (5)
I believe the answer is:
blast
This could be a double definition.
'report' is the first definition.
(I've seen this before)
'an explosive nature' is the second definition.
'blast' can be an answer for 'nature' (blast is a kind of nature). I am unsure of the 'an explosive' bit.
'of' is the link.
Can you help me to learn more?
(Other definitions for blast that I've seen before include "Mild expletive - sharp explosion" , "Blow up or swear" , "Noise of explosion" , "Blow up with explosives" , "Loud horn sound" .)