Either way it's a mode of address (5)

I believe the answer is:

madam

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'either way' is the definition.

I don't understand the rest of the clue.

(Other definitions for madam that I've seen before include "formidable woman" , "Stuck-up girl" , "Woman with status - girl with bad manners" , "Woman running a brothel" , "Palindrome used in speaking politely to a woman" .)

I've seen this clue in The Globe and Mail.

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