Shine; language (6)
I believe the answer is:
polish
I believe this is a double definition.
'shine' is the first definition.
(I know that shine can be written as polish)
'language' is the second definition.
(Polish is a language)
(Other definitions for polish that I've seen before include "class" , "Shine with soft cloth, say silverware" , "Rub - European" , "Smooth or shine by rubbing" , "Rub to make the surface shine" .)