Tidy up is a term used to describe the process of organizing and cleaning a space. STRAIGHTEN (10 letters) means to make something straight or orderly, CLEAN (5 letters) means to make something free of dirt and debris, NEATEN (6 letters) means to make something neat and tidy, SWEEP (5 letters) means to use a broom to CLEAN a surface, and SPRUCE (6 letters) means to make something look more attractive. All of these activities are part of the process of tidying up a space.