Crossword Genius

Smoothness, so to speak (6)

Ross

I believe the answer is:

polish

(Other definitions for polish that I've seen before include "Buff up - foreign language" , "Rub until shiny" , "Rub - refinement" , "Rub to a gloss" , "Shine for a European" .)

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