Polite behaviour (8)

I think it could be either:

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4,7

courtesy

'polite behaviour' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for courtesy that I've seen before include "Civility, politeness" , "Polite behaviour" , "good breeding" , "Politeness and respect for others" , "Good manners" .)

I've seen this clue in The Times, the Irish Times (Simplex) and the Sydney Morning Herald.

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