Possible Clues:

• Testimony opener
• 54-Across, here
• '___ Mommy Kissing Santa Claus'
• "__ it first!": "Dibs!"
• Part of a Caesar quote
• "No need to tell me what happened there"
• Mellencamp "___ you first"
• '___ the best minds of my generation ...'
• Warrant: "___ Red"
• '-- Three Ships'