Possible Clues:

• Pot in billiards that hits another ball first
• Sort of shot in billiards or by batting cricket side
• Snooker ball sunk having hit another
• Not a direct route into a net or pocket
• Billiards stroke
• One way into the goal or pocket
• Snooker hazard
• One number, played very loudly, is foul
• Pocketing of a snooker ball via a deflection
• Drunkard won't start on very strong pot