Related Clues:

• Pro ___
• See 72-Across
• ___-tat
• Tat-tat preceder
• One-named rock singer
• See 58-Down
• See 38-Across
• Pro ___ (proportionate)
• See 42-Down
• U
• One-named Irish singer
• Singer-turned-Congressman
• See 22-Down
• Pro follower
• Pro --- (proportionately)