Study country's borders on arrival (7)
I believe the answer is:
perusal
'study' is the definition.
(I've seen this before)
'country's borders on arrival' is the wordplay.
'country' becomes 'Peru' (Peru is an example).
'borders on arrival' becomes 'sal' (I can't justify this - if you can you should believe this answer much more).
'peru'+'sal'='PERUSAL'
Can you help me to learn more?
(Other definitions for perusal that I've seen before include "thorough scan" , "Careful examination" , "Study or scrutiny" , "Process of examination" , "A casual read or study" .)