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Salesman a diner in Winchester say (8)

Ross

I believe the answer is:

repeater

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'winchester say' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

'salesman a diner' is the wordplay.
'salesman' becomes 'rep' (I've seen this before).
'a diner' becomes 'eater' (to dine is to eat a meal).
'rep'+'eater'='REPEATER'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for repeater that I've seen before include "Burp" , "teller" , "Maybe watch" , "One keeps saying" , "Handgun able to fire again without reloading" .)

I've seen this clue in The Sun.
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