Vacate (8)
I believe the answer is:
evacuate
'vacate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for evacuate that I've seen before include "Leave unpopulated" , "Leave (a place of danger)" , "Send away form dangerous place as in wartime" , "In wartime, remove civilians from cities to safety of countryside" , "Make people leave a dangerous location" .)