Possible Clues:

• "___ been in my cookie jar?"
• "But ___ counting?"
• ''__ been sleeping in my bed?''
• '___ Who' (list of bios)
• "___ a good boy?!"
• With 49-Down, 'Time for someone else's turn'
• “___ on first?”
• '___ with me?'
• Victims of the Grinch’s stealing
• '— on first?'