Related Clues:

• Window's support
• Kind of proprietor
• It's underfoot!
• Cod's neighbor in the showcase
• ''O --- Mio''
• Cod's showcase neighbor, perhaps
• Seafood choice
• Sneaker feature
• Pump part
• Shoe cushion
• Entrance feature
• One and only
• Upright framing piece
• Shoe part that's wiped on 23-Down
• It's under a foot