Crossword Genius

Polite address common in the South (4)

Ross

I believe the answer is:

maam

(Other definitions for maam that I've seen before include "Polite address to a woman" , "Form of address to female royalty" , "HRH" , "Formal address to a lady" , "Polite address to Queen" .)

I've seen this clue in the USA Today.
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