Related Clues:

• Comment from the pen
• Hoggish comment
• Cattle calls?
• Pigpen plaint
• Porcine protest
• Sign of a pen problem?
• Barnyard cry
• Chester White remark
• Sound on a 58-Across, perhaps
• Pen pal's protest?
• Swine sound
• Pig's sound
• Pigpen sound
• Swine squeal
• Sow's remark