Crime of the Century ignored by iconic American talk show host (5)

I believe the answer is:
arson
'crime' is the definition.
(crime of illegally starting a fire)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for arson that I've seen before include "burning problem" , "Malicious crime" , "Crime involving fire" , "Fire-raising crime" , "Pyromaniac crime" .)
