Historical clue formulations

• Shrewd — 2019-03-17
• Sharp — 2009-07-03
• Street-smart — 2005-08-01
• Street-smart — 2005-04-20
• Shrewd — 2005-01-04
• Street-smart — 2001-07-08
• Shrewd — 1999-09-27
• Shrewd — 1999-08-19
• Careful — 1995-06-04
• Shrewd — 1994-10-09