Possible Clues:

• Meal without starter shortened – a blow
• Swinging blow from below aimed at an opponent's chin
• Some speed reduction can be part of fighter's armoury
• Swinging blow in boxing
• Ignored by superior -- what a blow!
• Many a knockout punch
• Boxer's blow
• Boxing blow under the chin
• Blow to have part of shoe removed
• Stimulant reduced -- that's a blow