Possible Clues:

• One with a focus in mathematics
• A curve in math
• A pitch then a strike turning in curve
• One of the conic sections of a curve
• Soldier retraced a launch's curve
• Curve ball from Spain undermines good round by amateur
• Curve in a tennis shot coming up after one following service?
• Norm has a short missile for this trajectory
• Described by a throw before a strike back?
• Curve like path of thrown object