Report of oil in this country (6)
I believe the answer is:
greece
'this country' is the definition.
(Greece is an example)
'report of oil' is the wordplay.
'report of' indicates a 'sounds like' (homophone) clue.
'oil' becomes 'grease' (grease is a kind of oil).
'grease' sounds like 'GREECE'.
'in' is the link.
(Other definitions for greece that I've seen before include "Mediterranean country" , "Modern-day classical Hellas" , "Country of Hellenes" , "Hellenic state" , "Mediterranean republic" .)