Related Clues:

• Rainbow, e.g.
• Curvature
• Semi-circle
• Bow part
• Projectile path
• Go fast
• Bowlike curve
• Jump a gap, as electricity
• Hot time
• Line of dramatic development
• Soap-opera story line
• Bow's shape
• Shuttlecock's path
• Series-long story line
• Parabola, essentially