Backchat about kilns (7)

I believe the answer is:

retorts

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'backchat about kilns' is the definition.
I can't tell whether this defines the answer.

'about kilns' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'kilns' becomes 'torts' (I can't justify this - if you can you should give a lot more credence to this answer).
're'+'torts'='RETORTS'

Can you help me to learn more?

(Other definitions for retorts that I've seen before include "Sharp replies or rejoinders" , "laboratory equipment" , "Makes witty or angry reply" , "Counters" .)

I've seen this clue in the Sydney Morning Herald.

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