Related Clues:

• Humanitarian rocker
• Lead singer on 'The Joshua Tree'
• Lead singer on "The Joshua Tree"
• Mayor pro __
• Pro ___ (in equal shares)
• Chaz (nee Chastity)
• First musician to be a ''Time'' Person of the Year
• U2 philanthropist
• Pro ___ (gratis)
• ___-tat-tat!
• Sonny, Cher's former partner
• Sonny of "Sonny & Cher"
• Cher's former singing partner
• Pro___
• Tat-tat preceder (hyph.)