Related Clues:

• You can count on it
• Lock
• More than a favorite
• Las Vegas lock
• It's a lock
• It can't fail
• It can't miss
• No-lose situation
• Guaranteed winner
• No-risk wager
• Lead-pipe cinch
• Can't-miss proposition
• It won't disappoint
• Gambler's cinch
• Shell game, to a con man