Possible Clues:

• Body recently demoted from place ordered out
• Cicero is taken from police court by mythical figure from the underworld
• It was downgraded in 2006
• Cartoon canine
• 2006 demotion
• Demotion in 2006 news
• Second smallest planet
• Ninth planet no more
• God of the underworld
• Dwarf planet that Neil deGrasse Tyson helped demote