Historical clue formulations

• Whack-a-mole whacker — 2021-04-20
• Part of certain percussion instruments — 2020-12-26
• Heavy hitter? — 2020-10-31
• Long-handled hammer — 2020-10-29
• Whack-a-mole implement — 2020-06-24
• Xylophonist's need — 2020-01-21
• Polo need — 2012-08-19
• Knocker — 2005-01-07
• Xylophonist's need — 2004-03-21
• Xylophone striker — 2001-05-22
• Croquet need — 2000-07-05
• Gong hitter — 1999-03-16
• Xylophone tool — 1998-12-08
• Xylophone striker — 1998-03-01