Historical clue formulations

• Morphine source — 2025-02-01
• Illicit poppy product — 2023-04-24
• ___ Wars, conflicts of 1839-42 and 1856-60 — 2021-06-13
• Stuff in a den, once — 2020-12-05
• Yves Saint Laurent perfume since 1977 — 2020-05-08
• Poppy product — 2020-04-13
• YSL perfume named for a drug — 2016-08-03
• Heroin source — 2015-09-22
• Drug from poppies — 2011-10-31
• "Confessions of an English ___-Eater" — 2011-01-16
• Yves Saint Laurent fragrance — 2010-08-03
• Poppy product — 2010-03-01
• It's addictive — 2009-11-05
• Poppy product — 2008-10-21
• Drug that's smoked in a pipe — 2008-09-29
• Painkiller since ancient times — 2008-04-01
• Smuggler's stock — 2007-10-17
• Smuggled stuff — 2007-04-19
• Kind of pipe — 2007-03-24
• Poppy product — 2006-06-28
• Poppy product — 2006-02-22
• It's addictive — 2006-02-12
• It may be found in a den — 2005-12-14
• Soporific substance — 2005-04-30
• Kind of den — 2004-11-02
• Religion, to Karl Marx — 2004-06-12
• Dope in a den? — 2004-03-24
• Codeine source — 2003-04-30
• Poppy product — 2002-05-20
• Codeine source — 2000-05-24
• Painkiller — 2000-03-24
• Kind of den — 1999-10-13
• Cause of an 1839-42 war — 1997-11-26
• Poppy product — 1997-08-11
• Southeast Asia product — 1994-09-23