Drive out, expel (4)
I believe the answer is:
oust
I believe this is a double definition.
'drive out' is the first definition.
(I've seen this before)
'expel' is the second definition.
(I know that expel can be written as oust)
(Other definitions for oust that I've seen before include "Show the door to" , "Throw out" , "Remove or reject from position" , "Remove from a position or office" , "Force out; supplant" .)