Related Clues:

• Bar shot
• Bullpen sound
• Pen pal's greeting?
• Pig's remark
• Piggy plaint
• Pen plaint
• 'Old MacDonald Had a Farm' sound
• Bull pen sound
• Babe-y talk?
• Sound that might accompany 37-Down
• Sound from 65-Across
• Make pig noises
• Sound of displeasure
• Pen call
• Pig chat