Electrical current in South Korea caused fire (4)
I believe the answer is:
sack
'fire' is the definition.
(dismiss someone from their job)
'electrical current in south korea caused' is the wordplay.
I cannot really understand how this works, but
'current' could be 'ac' (alternating current) and 'ac' is present in the answer.
'south' could be 's' (abbreviation) and 's' is found within the answer.
A single letter 'k' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sack that I've seen before include "Fire - rifle" , "Dismiss; plunder; wine" , "boot" , "Dismiss (from a job)" , "Destruction" .)