Related Clues:

• Double-curve shapes
• Outsides of sandwiches?
• Mountain road curves
• Test track features
• ''Sissy,'' mostly
• Tire tracks, often
• Pothooks
• Curved trajectories
• They aren't beelines
• Skiers may negotiate them
• Ball trajectories
• A lot of assessments?
• Half of scissors?
• Circle makers
• Storylines