Related Clues:

• Brazenness
• See 17 Across
• Brass, so to speak
• Optic __
• Fearlessness
• Confidence
• Hero's quality
• Daredevil's asset
• Temerity
• Signal transmitter
• Bottle
• Coolness under pressure
• ''Of all the ___!''
• 'The ___!' (perturbed cry)
• Self-possession