Related Clues:

• Like cult rituals
• Not meant to be repeated
• Whispered item
• Covert
• Cryptic
• Recondite
• Ban competition
• The untold story?
• It may be hard to keep
• Understood by few
• Spy's find
• Ban alternative
• Kind of agent or ballot
• Occult
• Skeleton in the closet, e.g.