Related Clues:

• See 23 Across
• Tennis lobs, e.g.
• Incites excitement
• Story progressions
• Signs of a bad outlet
• C shapes
• Tossed-ball trajectories
• They may be drawn with compasses
• Geometric curves
• Trajectories, often
• Airborne embers
• Tire tracks, often
• Curved trajectories
• Ball trajectories
• Circle makers