More polite with agent (3)

I believe the answer is:

rep

'agent' is the definition.
(short for representative)

'more polite with' is the wordplay.
'with' says the answer is hidden in the clue.
'REP' is hidden in the letters of 'more polite'.

(Other definitions for rep that I've seen before include "Theatre; fabric; salesman" , "agent" , "Salesperson" , "Representative; fabric" , "Stuff" .)

I've seen this clue in The Mirror.

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