State that Alabama's like the borders of Korea (6)
I believe the answer is:
alaska
'state' is the definition.
(Alaska is an example)
'alabama's like the borders of korea' is the wordplay.
'alabama' becomes 'al'.
'like' becomes 'as'.
'the borders of' suggests removing the centre.
'korea' with its middle removed is 'ka'.
'al'+'as'+'ka'='ALASKA'
'that' is the link.
(Other definitions for alaska that I've seen before include "Largest US state by area" , "NW US state" , "American state, capital Juneau" , "State of north-west US" , "Land bought by the USA from Russia in 1867" .)