North Korean entered beer joint (5)
I believe the answer is:
ankle
'joint' is the definition.
(joint of the body)
'north korean entered beer' is the wordplay.
'north korean' becomes 'nk' (this could be a standard abbreviation which I don't know about).
'entered' is an insertion indicator.
'beer' becomes 'ale' (type of beer).
'nk' put into 'ale' is 'ANKLE'.
Can you help me to learn more?
(Other definitions for ankle that I've seen before include "Foot-leg connector" , "Human joint" , "Leg-joint" , "Major foot joint" , "Low joint" .)