Character risked a removal from Kildare Street (6)

I believe the answer is:

letter

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'character' is the definition.
(letter is a kind of character)

I can't explain the rest of the clue.

(Other definitions for letter that I've seen before include "Character - landlord - epistle" , "An alphabetic unit" , "Written message" , "Character of the alphabet" , "Communication via the postman" .)

I've seen this clue in the Irish Times.

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