Related Clues:

• Rainbow, for one
• Not the shortest line between two points
• Compass course?
• Go up in the middle
• Smiley face smile
• Part of a sector
• Parenthesis, e.g.
• It doesn't go full circle
• Storyline
• Not quite a circle
• ''Joan of ---'' (1948)
• Discharge between two electrodes
• Ulna's neighbor
• Welding phenomenon
• Sector boundary