The fat of the land do we hear? (6)
I believe the answer is:
grease
'the fat' is the definition.
(thesaurus)
'the land do we hear?' is the wordplay.
'the land' becomes 'greece' (Greece is an example).
'do we hear?' shows a homophone (sound like).
'greece' sounds like 'GREASE'.
'of' is the link.
(Other definitions for grease that I've seen before include "Travolta's 1978 film" , "Fatty lubricant" , "-- gun; -- monkey" , "Musical - lubricant" , "Possible cause of slip-up" .)