Jumper cable connection (5)
I believe the answer is:
'jumper cable connection' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for anode that I've seen before include "Opposite to cathode" , "Electrical terminal" , "that comes out of a cell?" , "Negative terminal of a battery" , "Eg, battery terminal" .)