Penny most recently mentioned missing first sales talk (6)

I believe the answer is:

patter

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'sales talk' is the definition.
(sales patter)

I can't explain the rest of the clue.

(Other definitions for patter that I've seen before include "Line of gab" , "Salesperson's talk" , "Light repetitive sounds - little feet or rain" , "Rapid glib speech, perhaps from salesman" , "idle talk" .)

I've seen this clue in The Times.

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