Possible Clues:

• Fraidy cat's lack
• See 17 Across
• Valour, pluck
• One's art without frames, extremely versatile and daring
• Ace, perhaps, losing head and gaining new courage
• French author switching couple of characters shows courage
• Brass still coating rupees from the east
• Spinal cord part
• "That's some ___!"
• Bottle – neck