Crime's a burning question (5)
I believe the answer is:
arson
'crime's' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for arson that I've seen before include "Criminal pyromania" , "A burning crime" , "Roans (anag)" , "Fire-lighting crime" , "Be pettish" .)