Clue: Making fun of man about to be burned? (6)
Answer: GUYING
Explanation: Making fun of man about to be burned? (6)
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).