After test regarding the country … (8)
I believe the answer is:
pastoral
'regarding the country' is the definition.
(pastoral describes artworks with rural themes)
'after test' is the wordplay.
'after' becomes 'past' (I've seen this in other clues).
'test' becomes 'oral' (oral is a type of examination).
'past'+'oral'='PASTORAL'
(Other definitions for pastoral that I've seen before include "Portraying romanticised country life" , "bishop's staff" , "Relating to the countryside or shepherds" , "Of sheperds, or concerned with spiritual guidance" , "of minister's duties" .)