A plan to get rid of electric current in upper floor (5)
I believe the answer is:
attic
'upper floor' is the definition.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for attic that I've seen before include "The highest room" , "Athenian Greek" , "Room inside a building's roof space" , "Greek - garret" , "Greek - upper room" .)