Possible Clues:

• Socially exclusive
• Exclusive
• Clannish
• Clubs reportedly subject to breaches — like many exclusive groups
• Pretentiously exclusive
• Exclusive clubs start to thaw, perhaps when fellow leaves
• Exclusive alcoholic drink men discarded in church yard
• Like faction caught disclosing secrets verbally?
• Exclusive measure of intelligence penetrates key to mystery at last
• Exclusive hint about the first question upset youth leader