Related Clues:

• Trajectory shape
• Season-long storyline, on TV
• The R in pi*R^2
• Orbit segment
• Highway bypass, usually
• Smiley smile
• Plot's path
• Bone in forearm
• Circular path
• Lob's trajectory
• Joan of __
• Follow the rainbow
• Pop fly's path
• Figure that's squared in a common formula
• Part of a loop