Related Clues:

• "Stop," for one
• Billboard, for example
• New York Stock Exchange symbol
• 11-Down, for one
• Do it on the dotted line
• Portent; notice
• Cow lacking male chromosome? On the contrary!
• The twins, say, communicate non - verbally
• Inconsistent statement in Pope's document
• Give your name to, as a gesture
• Bovine male
• A beast who might run in battle
• Self-contradiction in Vatican edict
• Notice; omen
• Give autograph as a gesture