Electric atom (3)
I believe the answer is:
ion
'electric atom' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ion that I've seen before include "Electrically charged atom or group of atoms" , "Subatomic particle" , "Particle (phys.)" , "Electrically charged particle" , "Charged atom/molecule" .)