Related Clues:

• Three-point line, e.g.
• Looping line drive's path
• Turn sharply
• Pitched softball's path
• Trig term
• Curve shape
• Rainbow, for one
• Not the shortest line between two points
• Secret motive
• Compass course?
• Go up in the middle
• Smiley face smile
• Part of a sector
• Parenthesis, e.g.
• It doesn't go full circle