Shine in languages (6,6)
I believe the answer is:
french polish
'shine' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for french polish that I've seen before include "finish" , "bilingually" , "gloss? - with 14a" , "Shellac dissolved in alcohol, used on furniture" , "rub - with 15a" .)