Use plan in touring Korea, for one (9)
I believe the answer is:
peninsula
'korea for one' is the definition.
(korea is a kind of peninsula)
'use plan in touring' is the wordplay.
'touring' indicates an anagram (touring can mean moving around).
'use'+'plan'+'in'='useplanin'
'useplanin' anagrammed gives 'PENINSULA'.
(Other definitions for peninsula that I've seen before include "Long narrow piece of land projecting into the sea" , "9 [WHATS THE POINT] of land" , "historic war zone" , "Lower California, say" , "land project" .)