Possible Clues:

• Diamonds or clubs, in bridge
• Little action in clubs, perhaps
• Diamonds, for example, young girl put on smart dress
• Underage courtship in clubs?
• One searching for gems, we hear, requiring case for diamonds perhaps?
• Possible case involving children in clubs, perhaps?
• Beneath top of mainmast, cast-iron case for the quarterdeck, perhaps?
• Small legal action for diamonds
• Tourism is about touring trendy clubs, for example
• Clubs may be involved in petty action?