Related Clues:

• Cyclops' singleton
• Watcher
• Rope loop
• Part of a needle
• Mr. Potato Head part
• Spy satellite, metaphorically
• It's sometimes winkin' or blinkin,' but doesn't nod
• It's held in an orbit
• It may be public or evil
• Thread target
• Hieroglyphic symbol
• Spud's bud
• Close watch
• Word with private or public
• Scope out