Possible Clues:

• “To refresh your memory...”
• 'In case you didn't hear me ...'
• Reiteration lead-in
• 'To repeat ... '
• 'To repeat myself...'
• 'So ___ to the guy ...'
• "To repeat . . ."
• 'Since you didn't hear me the first time ...'
• Reiterating words
• Start of a "Come again?" response