Related Clues:

• Start of a prank, maybe
• Chance it
• Draw a line in the sand, perhaps
• Increase in intensity
• Call one's bluff
• Defy
• Beard
• It's for those who can't handle the truth
• 'Make my day,' e.g.
• Increase, as production
• Issue a challenge to
• Show spunk
• Be brave
• Increase by degrees
• Provoke to prank, perhaps