Historical clue formulations

• Submission to a record executive — 2025-02-06
• What 25-, 40- and 51-Across might originally have appeared on, appropriately? — 2023-11-08
• Cassette submitted to a record label — 2022-09-26
• Rock sample? — 2018-04-21
• Old means of getting discovered — 2017-03-31
• Mailing to a record exec, once — 2014-12-28
• Mailing to a label — 2013-05-17
• Musical sampler — 2004-10-29
• Mailing to a record exec — 2004-06-03
• Talent scout's request — 2003-08-15
• It shows what you can do — 2003-07-26
• Aspiring artist's submission — 2003-03-14
• Record company receipt — 2002-03-15