Related Clues:

• 18-Down's emblem
• Device that's defective, for example, is rejected
• Identification mark of one from a set that's incomplete
• Hector has no right to the insignia
• Emblem showing membership etc
• Emblem signifying membership
• Emblem signifying rank, membership etc
• Insignia (of office?)
• Award sewn on a sash
• Schoolwork sticker
• A detective might flash it
• "The Red ___ of Courage"
• It's flashed by the law
• Kindergartner's reward
• Emblem carried on a beat