Crossword Genius

A European shiner! (6)

Ross

I believe the answer is:

polish

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'a european' is the first definition.
(I've seen this before)

'shiner' is the second definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe you can see an association between them that I don't see?

Can you help me to learn more?

(Other definitions for polish that I've seen before include "Shine up the nationality" , "Shine up in Warsaw" , "Give shine to" , "See 1" , "Rub - European" .)

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