Possible Clues:

• Dagger with narrow blade
• Weapon as woman's precarious sole means of support?
• Lift provider on a runway
• Dagger, note, left in fight
• Way to incorporate fired clay in dagger
• Knife fight about it upset student
• Sharp footwear?
• Weapon on fire, launched in fight
• Knife fight pinching cash box, practically
• Boot heel, perhaps