Crossword Genius

Perfect language (6)

Ross

I believe the answer is:

polish

I believe this is a double definition.

'perfect' is the first definition.
(polishing is a kind of perfecting)

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

(Other definitions for polish that I've seen before include "Beeswax, for example" , "European - gloss" , "Substance used to produce shine" , "taught in finishing school?" , "Language (linked to spitting?)" .)

I've seen this clue in The Times and The Telegraph.
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