Related Clues:

• Fold calls
• "Serpico" author
• Calls to Mary?
• Sounds in 'Old MacDonald Had a Farm'
• Acts sheepish?
• A sailor returns as old MacDonald heard these
• South African leader bleats
• They're heard in a herd
• Calls from a 27-Down
• "The Whiffenpoof Song" sound effects
• Sheep noises
• "Serpico" writer Peter
• Pasture calls
• The non-silence of lambs
• Barnyard bellows