Possible Clues:

• Tidies up to do some homework at school
• Prepares for company, perhaps
• Disinfects
• The century is inclined to make use of a washer
• Antisepticizes
• See, it's inclined to have been in need of a washer
• Removes filth from film stores, including Fifty Shades' penultimate feature
• Washes, removes dirt
• The century is inclined to have had a 20 down (6)
• Removes dirt, washes