1. an act of removing objects to make a place or area tidy
clean out a house/car/room
As a noun, a 'clean-out' of somewhere or something means to remove items or objects in order to make a place cleaner or tidier. You might have a 'clean-out' of a house before redecorating or 'a clean-out of your car' before bringing it to a mechanic. You can also 'clean-out' a bank account for example, which means to remove so much money that nothing is left. As a phrasal verb 'clean out' refers to the action of removing things to make something seem cleaner or tidier. Used in social and professional contexts.