Electricity in stable (6)
I believe the answer is:
static
This clue is a double definition.
'electricity' is the first definition.
(static electricity is a kind of electricity)
'stable' is the second definition.
(thesaurus)
'in' acts as a link.
(Other definitions for static that I've seen before include "Its cat (anag)" , "irritation for the listener?" , "Not moving - electrical interference" , "That's shocking!" , "Inert or passive, like some electricity" .)