Possible Clues:

• Darth Vader, e.g
• Darth Sidious' order
• Darth Vader, for one
• 'Dark side' sci-fi group
• 'Only a ___ deals in absolutes' ('Star Wars' quote)
• Jedi's enemy
• Force wielders of film
• Vengeful ''Star Wars'' group
• Group on the dark side of the Force
• ''Revenge of the ___''