Crossword Genius

The language could be French (6)

Ross

I believe the answer is:

polish

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'the language' is the definition.
(Polish is a language)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for polish that I've seen before include "Language (linked to spitting?)" , "Brush up" , "Rub until shiny" , "Gloss - refinement" , "Perfect" .)

I've seen this clue in the Evening Standard.
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