Meaning of “clean sth out” - Learner’s Dictionary

clean sth out

phrasal verb with clean us uk /kliːn/ verb [ I, T ]

to take everything out of a room, car, container, etc and clean the inside of it

STEAL informal

to steal everything from a place:

Her apartment had been cleaned out by burglars.

(Definition of “clean sth out” from the Cambridge Learner’s Dictionary © Cambridge University Press)