Char occasionally good, as the French say, in emerging "extreme grilling" (11)

I believe the answer is:

carbonising

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

'say in emerging extreme grilling' is the definition.
The definition suggests a verb in its base form which matches the answer.

'char occasionally good as the french' is the wordplay.
I cannot quite see how this works, but
'good' could be 'bon' (I've seen this in other clues) and 'bon' is located in the answer.
'as' could be 'in' (I've seen this in other clues) and 'in' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.