Dispel (6)
I believe the answer is:
banish
'dispel' is the definition.
(I know that banish is a more specific form of the action dispel)
This is all the clue.
(Other definitions for banish that I've seen before include "Send into exile" , "dislodge" , "Drive away, maybe from country" , "Expel from a community or group" , "Deport, exile" .)