Possible Clues:

• Likelihood decreases
• Category that excludes 1
• 50:50 chance
• Levels less likely than 27
• Roulette bets with nearly 1:1 odds
• Not odds but ends for 22 across
• Level bet on directions taken by First Lady
• 2, 4, 6, 8, 10, etc.
• Quits from missus, never coming back
• Welshman has change of heart, finding betting odds