Island left by territorials touring a country (5)
I believe the answer is:
haiti
'a country' is the definition.
(Haiti is a country)
'island left by territorials touring' is the wordplay.
'island' becomes 'ait' (term for a small island).
'left by territorials' becomes 'hi' (I can't justify this - if you can you should give a lot more credence to this answer).
'touring' means one lot of letters goes inside another (touring can mean going round).
'ait' going into 'hi' is 'HAITI'.
Can you help me to learn more?
(Other definitions for haiti that I've seen before include "West Indies country associated with voodoo" , "Republic sharing WI isle" , "Caribbean state" , "I hit a West Indian island" , "Western part of island discovered by Columbus in 1492" .)