Related Clues:

• Modify to particular conditions
• Ford's first, e.g.
• One of ten on a ten-speed
• Trim to fit, perhaps
• Suit yourself?
• Cyclist's choice
• Clock part
• Modify to new conditions
• Transmission part
• Adjust to changes
• Machinery part
• It may be stowed or shifted
• Couturier
• Shifting choice
• Apparatus