Possible Clues:

• Punch from below saddle?
• Blow as meal without starter cancelled
• Drug made less pure? That's a blow
• Drug reduced, might that hurt?
• Part of shoe gashed -- that's a blow
• Punch to the chin, from below
• Ignored by superior? That’s a blow
• Boxing punch often landed on the chin at close range
• Blow ration after late meal with no starter
• Drug reduced -- that could be a blow