Crossword Genius

Brush up on tongue (6)

Ross

I believe the answer is:

polish

This clue is a double definition.

'brush up' is the first definition.
(synonyms)

'tongue' is the second definition.
(Polish is an example of a language)

'on' acts as a link.

(Other definitions for polish that I've seen before include "tongue" , "Refine, language" , "A West Slavic language" , "make things shiny" , "Rub until shiny" .)

I've seen this clue in the Sydney Morning Herald.
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