Possible Clues:

• This -- invariably lethal -- used for starters in fight?
• Steps in field: too much going over shoe
• Weapon some strap to their foot
• Weapon some strap to their feet
• Shoe sometimes called a "spike heel"
• Shoe named after a dagger
• Sharp-heeled heel
• Kind of woman's shoe
• Dagger that is lethal first of all used in set-to
• In fight, large Italian twisting blade