Talk to Jack, the toad! (6)

I believe the answer is:

natter

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'talk' is the definition.
(I have seen 'Casual talk' mean 'natter' so perhaps 'talk' could also mean 'natter')

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for natter that I've seen before include "Talk socially without exchanging too much information" , "Chat - gossip" , "Talk continually or annoyingly" , "idle talk" , "Gossip, maybe annoyingly" .)

I've seen this clue in the Evening Standard.

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