Historical clue formulations

• Speculative venture — 2025-11-01
• Ad that's handed out on the street — 2025-10-27
• Handbill — 2025-01-14
• Frequent-___ miles — 2024-09-02
• Superman, notably — 2017-08-25
• Take a ___ — 2015-10-17
• Ace on a base — 2014-09-12
• Pilot — 2009-01-19
• Barnstormer — 2005-03-31
• Ace — 1998-09-26