Related Clues:

• Bed occupant
• Grayish-white
• Tasty mollusk
• Gem holder, maybe
• The world, in metaphor
• Hangtown fry ingredient
• Off-white color
• Shellfish
• Source of an advantage, figuratively
• Uncommunicative one
• Huitres
• Rock-clinging mollusk
• Pearl harborers
• Mollusk on menus
• Shell fish