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

I believe the answer is:

guying

I'm a little stuck... Click here to teach me more about this clue!

'making fun of' is the definition.
('guy' can be a synonym of 'make fun of')

'man about to be burned?' is the wordplay.
I cannot quite see how this works, but
'man' could be 'guy' (guy is a kind of man) and 'guy' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Guardian.

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