Old lines surround area abroad (8)
I believe the answer is:
overseas
'abroad' is the definition.
(both can mean in another country)
'old lines surround area' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'lines' becomes 'verses' (verse is a kind of line).
'surround' is an insertion indicator.
'area' becomes 'a' (maths abbreviation).
'verses' enclosing 'a' is 'verseas'.
'o'+'verseas'='OVERSEAS'
(Other definitions for overseas that I've seen before include "abroad - with 12a" , "In foreign parts" , "Exotic" , "In a foreign country" .)