The offence of one coming to light (5)
I believe the answer is:
arson
This might be a double definition.
'the offence' is the first definition.
(crime of illegally starting a fire)
'one coming to light' is the second definition.
I know that 'light' relates to this answer. I also know that both the answer and definition are singular nouns
'of' acts as a link.
Can you help me to learn more?
(Other definitions for arson that I've seen before include "burning problem" , "Malicious fire-raising" , "Crime of fire-setting (5)" , "Crime involving fire" , "serious offence" .)