Related Clues:

• Car gear
• Invert
• Fail to follow suit, in bridge
• Back out of an agreement
• Disappoint, in a way
• Go back on one's word
• Gearshift setting
• Gear position
• Bridge no-no
• Transmission setting
• Play the wrong suit
• Gearbox option
• Commit a gaffe in bridge
• Ruff without a void, e.g.
• Card table error