Shine in language?
I believe the answer is:
polish
I believe this clue is a double definition.
'shine' is the first definition.
(I know that polish is a type of shine)
'language?' is the second definition.
(Polish is an example)
'in' is the link.
(Other definitions for polish that I've seen before include "class" , "Shine for a European" , "Give shine to" , "Europeans" , "Language (linked to spitting?)" .)