Related Clues:

• Buck
• With 15-Across, linguini topping
• Silent one
• It goes without saying
• Dollar, in slang
• He's not one to talk
• Smacker
• Gesturer
• Hardly a blabbermouth
• Symbol of noncommunication
• Shut (up)
• One who gives the silent treatment?
• Bisque bit
• Handy performer?
• Charades, essentially