Related Clues:

• Edible shellfish
• Dollar, casually
• Seafood in a shell
• Marine bivalve
• Uncommunicative sort
• Food on a cob
• Trite jokes
• Bivalve
• Ming, the oldest animal ever discovered (400+ years), was one
• Polenta grain
• It's covered in silk
• Don't talk, with, ''up''
• Succotash, partly
• Bivalve shellfish
• Grain on a toe?