Possible Clues:

• Place for loafers
• Makeshift storage
• Very small house, Oxford home?
• Flat container
• Greeting-card brand
• Container for the end of 17-, 31-, 47 or 64-Across; there's a literal one in each four-square puzzle corner
• Footwear container
• Oxford couple may have been put in this small room
• Room for a mule maybe, but not to swing a cat!
• Crocs may sit in one