Possible Clues:

• 'Tell me now'
• 'Go ahead, let me hear it'
• 'Tell me more'
• 'Lay it on me!'
• *"You have my full attention"
• 'You have my full attention' ... or something 17-, 24-, 38- and 51-Across might say?
• "You have my full attention!"
• "Tell me!"
• "You've got my undivided attention"
• "You have my attention"