Korean explorer (4)
I believe the answer is:
park
I believe this clue is a double definition.
'korean' is the first definition.
(common Korean surname)
'explorer' is the second definition.
(I have seen 'Scottish explorer' mean 'park' so perhaps 'explorer' could also mean 'park')
(Other definitions for park that I've seen before include "Manoeuvre vehicle into suitable place" , "Large area of land for public recreation" , "Open public area" , "pitch" , "South ---; TV cartoon" .)