Monkey about in the borders of neutral country (5)
I believe the answer is:
nepal
'country' is the definition.
(Nepal is an example)
'monkey about in the borders of neutral' is the wordplay.
'monkey' becomes 'ape' (I've seen this before).
'about' is a reversal indicator.
'in the' indicates putting letters inside.
'borders of' means to remove the middle letters.
'neutral' with its centre removed is 'nl'.
'ape' backwards is 'epa'.
'epa' inserted within 'nl' is 'NEPAL'.
(Other definitions for nepal that I've seen before include "mountainous region" , "somewhere in Asia" , "Asian republic" , "Where climbers may be" , "hilly part of Asia" .)