Possible Clues:

• Word that becomes its own synonym if the last letter is moved to the front
• Totally despicable like 'Smoke Ring for My Halo' singer Kurt
• Fiendish
• Shameful, ripping heart out of French town
• Really bad
• Adjective for an evil person
• Component of evil empire that is particularly so
• Synonym and anagram of 24-Down
• Foul and wicked, beginning to end
• Wicked (and an anagram of 52-Down)