Historical clue formulations

• Fair trade, say — 2026-08-29
• Cashless transaction — 2026-01-09
• Cashless deal — 2025-09-24
• Give and take — 2025-09-04
• Substitute — 2024-08-18
• Simple trade — 2024-06-10
• Trade — 2023-06-12
• Make a trade — 2023-03-12
• Exchange — 2023-01-11
• Cashless deal — 2022-12-02
• Trade — 2022-06-28
• Give this for that — 2022-04-12
• Quid pro quo — 2022-02-25
• Face ___ (app that creates bizarre photos) — 2021-09-13
• Substitute — 2021-06-18
• Exchange — 2020-12-08
• Trade — 2020-11-04
• Give and take, say — 2019-05-11
• Tit for tat? — 2018-12-23
• Tit for tat? — 2018-11-21
• Trade — 2018-09-26
• Give and take — 2018-05-16
• Exchange — 2017-09-19
• Exchange — 2017-03-29
• Even trade — 2017-03-28
• It's a deal — 2017-02-26
• Exchange — 2015-01-14
• Substitute — 2015-01-04
• Exchange — 2014-11-03
• Trade — 2013-10-07
• Tit for tat? — 2013-06-09
• One-for-one transaction — 2013-03-06
• Exchange — 2011-11-07
• Cashless transaction — 2011-10-18
• Trade — 2010-09-13
• Switch — 2010-05-27
• Quid pro quo — 2010-05-01
• Cash-free transaction — 2010-01-20
• With 67-Across, an appropriate title for this puzzle? — 2009-05-26
• Tax-free transaction, usually — 2009-03-19
• Tit for tat ... or tat for tit — 2008-11-18
• Give and take — 2008-08-28
• Mistake at the hospital? — 2007-03-31
• Exchange — 2007-03-01
• Substitute — 2006-02-12
• Trade — 2005-09-19
• Something to haggle over — 2005-07-13
• Cashless deal — 2005-03-08
• Give and take — 2005-02-02
• Give this for that — 2004-12-27