Like two Europeans providing gloss? (6,6)
I believe the answer is:
french polish
'gloss?' is the definition.
(I've seen this before)
'like two europeans' is the wordplay.
'like two' becomes 'french' (I can't justify this - if you can you should give a lot more credence to this answer).
'europeans' becomes 'polish' (I've seen this before).
'french'+'polish'='FRENCH-POLISH'
'providing' acts as a link.
(Other definitions for french polish that I've seen before include "Shellac dissolved in alcohol, used on furniture" , "Glossy varnish for wood" , "Shiner" , "bilingually" , "Shine" .)