The late diplomat Madeleine eschewed second-class. OK? (7)

I believe the answer is:

alright

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'ok?' is the definition.
('alright' can be a synonym of 'ok')

I can't explain the rest of the clue.

(Other definitions for alright that I've seen before include "Satisfactory or adequate" , "Fine; agreed" , "satisfactory for some of us" , "Okay" , "OK, as some would have it" .)

I've seen this clue in The Independent.

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