Related Clues:

• "B.C." money
• Gastropod
• Steamer, e.g.
• Edible mollusk
• Chowder choice
• Thing to be as happy as
• Chowder chunk
• Nontalkative one
• Silent type
• Happy mollusk?
• Cherrystone, e.g.
• Chowder flavor
• Simoleon
• Reticent one
• One who's close-mouthed