Crossword Genius

Architectural finish (6)

Ross

I believe the answer is:

stucco

(Other definitions for stucco that I've seen before include "material for covering wall" , "Decorative wall coating" , "Durable finish for walls" , "Mixture for decorative use on buildings" , "Cement or plaster used for coating walls" .)

I've seen this clue in The New York Times.
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