Historical clue formulations

• Reply to "You dig?" — 2023-05-28
• "Gotcha," more informally — 2022-12-04
• "Gotcha," in old lingo — 2016-05-21
• "Gotcha, dude" — 2015-04-12
• "Gotcha," in old lingo — 2014-09-13
• "You dig?" reply — 2014-06-15
• Beatnik's "gotcha" — 2013-10-09
• Beatnik's "Gotcha" — 2013-06-05
• Beatnik's "Gotcha" — 2011-10-31
• 64-Across, to a cat — 2010-12-31
• Beatnik's "Got it!" — 2009-05-04
• Beatnik's "Understood" — 2008-11-26
• Beatnik's "Got it" — 2008-11-10
• Comment from a person who digs — 2007-04-03
• "Gotcha, bro" — 2006-07-03
• Cool cat's acknowledgment — 2005-07-20
• Cat's comment of understanding — 2002-01-10
• 1965 Frishberg-Dorough tune — 1996-02-01