Going round part of Afghanistan or Pakistan border (5)
I believe the answer is:
apron
'border' is the definition.
(apron can mean a border or covering)
'going round part of afghanistan or pakistan' is the wordplay.
'going round' says the letters should be written in reverse.
'part of' says the answer is hidden in the clue.
'norpa' can be found hidden inside 'afghanistan or pakistan'.
'norpa' written backwards gives 'APRON'.
(Other definitions for apron that I've seen before include "Front stage; protective garment" , "Extension of stage in front of curtain" , "Protective kitchen wear" , "Kitchen garment or aerodrome strip" , "Airport area for manoeuvring and loading planes" .)