Related Clues:

• Assassin's order
• Render senseless
• Leave dumbfounded
• Surprise big-time
• Stun with brilliance
• Impress-plus
• Crack up
• Knock dead, as a crowd
• Greatly surprise
• Overwhelm with one-liners
• Oohing cause
• Zap with a Taser
• Notable act
• Something to stand in
• Gape producer