This sounds like a country lubricant (6)
I believe the answer is:
grease
'lubricant' is the definition.
(I've seen this in another clue)
'this sounds like a country' is the wordplay.
'this sounds like' shows a homophone (sound like).
'a country' becomes 'greece' (Greece is a European country).
'greece' sounds like 'GREASE'.
(Other definitions for grease that I've seen before include "Possible cause of slip-up" , "Musical starring John Travolta and Olivia Newton-John" , "Lubricating agent" , "Fat, film" , "Musical - lubricant" .)