Territory over there outside the UK (5)
I believe the answer is:
yukon
'territory' is the definition.
(Yukon is an example)
'over there outside the uk' is the wordplay.
'over there' becomes 'yon' (I've seen this before).
'outside' indicates putting letters inside.
'yon' enclosing 'uk' is 'YUKON'.
(Other definitions for yukon that I've seen before include "Territory of northwest Canada" , "Canadian region" , "Canadian Gold Rush area" , "River in northern Canada" , "NW Canadian territory" .)