Historical clue formulations

• Start of some advice … or a phonetic hint to 17-, 24-, 37- and 48-Across — 2023-12-19
• Advice lead-in — 2023-08-04
• Lead-in to some unsolicited advice — 2023-02-03
• See 16-Across — 2010-09-30
• Advice starter — 2004-11-26