Historical clue formulations

• Certain volleyball hit — 2025-09-10
• Sharp increase — 2023-12-19
• Hard hit in volleyball — 2021-09-14
• Sharp increase — 2017-09-19
• Add alcohol to, as punch — 2015-11-30
• Feature of a punk hairdo — 2015-10-20
• Director Lee — 2012-07-31
• Rail nail — 2012-05-26
• Shoot up — 2012-04-20
• Really high heel — 2011-04-04
• Lace — 2010-05-06
• Unusually high 17-Across — 2009-02-13
• Sudden increase — 2008-10-12
• Abrupt increase on a graph — 2008-03-09
• Sudden increase on a graph — 2007-05-20
• Add liquor to, as punch — 2007-04-23
• Sudden increase — 2004-07-03
• Shoot up — 2002-04-10
• Volleyball kill — 2002-02-25
• Sudden upturn, as in sales — 1999-05-02
• Net feat — 1997-03-08
• Lace with liquor — 1996-10-02