1.
If you tell someone to ~ of a place or to ~, you are telling them rather rudely to leave the place. (INFORMAL)
She turned to the others in the room. ‘The rest of you ~ of here.’...
‘Clear out!’ he bawled. ‘Private property!’
= get out
PHRASAL VERB: V P of n, V P disapproval
2.
If you ~ a container, room, or house, you tidy it and throw away the things in it that you no longer want.
I took the precaution of clearing out my desk before I left.
PHRASAL VERB: V P n (not pron), also V n P
see also clear-out