Related Clues:

• Flatfish
• Fish dish
• Lone fish?
• Worn part of a shoe
• Possible splinter site
• Boot reinforcement
• Kind of proprietor
• It's underfoot!
• Cod's neighbor in the showcase
• ''O --- Mio''
• Cod's showcase neighbor, perhaps
• Seafood choice
• Pump part
• One and only
• Shoe part that's wiped on 23-Down