Crime of fire raising (5)
I believe the answer is:
arson
'crime of fire raising' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for arson that I've seen before include "Malicious fire-raising" , "Incendiary act" , "Crime of fire-setting (5)" , "Crime of fire raising" , "Criminal burning of property" .)