Historical clue formulations

• Tom's frenemy in old cartoons — 2023-10-24
• Rice with three rings — 2011-01-27
• Former boyfriend of 15-Across — 2010-06-22
• Comic Lewis — 2006-03-05
• Ben's partner — 2004-12-01
• Hanna-Barbera mouse — 2003-09-14