Area in terrain so bare back in country (6)
I believe the answer is:
bosnia
'country' is the definition.
(I have seen 'Balkan country ' mean 'bosnia' so perhaps 'country' could also mean 'bosnia')
'area in terrain so bare back' is the wordplay.
'area' indicates a hidden word (I've seen 'area of' mean this (I've seen this in other clues)).
'back' says the letters should be written backwards.
'ainsob' is hidden in the letters of 'in terrain so bare'.
'ainsob' written backwards gives 'BOSNIA'.
'in' acts as a link.
(Other definitions for bosnia that I've seen before include "Balkan state" , "Balkan region joined with Herzegovina" , "European country, capital Sarajevo" , "Formerly part of Yugoslavia" , "Southeast European country (shortened form)" .)