Making fun of man about to be burned? (6)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Roasting? A play on GUY as on November 5, Bonfire Night (although the original Guy Fawkes died by hanging, the escape of Parliament and King was celebrated by lighting bonfires, and the practice became conflated with the pagan burning of a straw or wicker man).