Related Clues:

• Pump part
• Clog or sandal
• Callous cad
• Chemin de fer need
• Sole support
• One that gets tongue-tied?
• Height enhancer
• There may be a spat about it
• Type of string
• Achilles' weak spot
• A real loafer
• Pump, perhaps
• Tongue-tied one?
• If it fits, wear it
• Oxford, for one