Historical clue formulations

• Classic game show … or a hint to 17-, 26- and 47-Across — 2022-08-01
• "I'm willing to pay that amount" — 2021-04-19
• Long-running game show with a feature spelled out clockwise by this puzzle's circled letters — 2014-09-30
• "Definitely worth getting" — 2003-06-03