Historical clue formulations

• Start, as a meal — 2020-07-22
• Explore deeply — 2015-12-27
• Tackle, as a difficult subject — 2013-07-01
• Start chowing down — 2012-03-22
• Go to work on — 2008-09-05
• Start eating — 2006-06-11
• Investigate — 2003-08-25
• Investigate — 2002-09-18