Answer: curveball

AnswerCrossword Clue
CURVEBALLSlider relative
CURVEBALLBert Blyleven's speciality
CURVEBALLPitcher's specialty
CURVEBALLTricky pitch
CURVEBALLPitcher's delivery
CURVEBALLUnexpected development
CURVEBALLUnpleasant surprise, so to speak
CURVEBALLChanging pitch
CURVEBALLUnexpected pitch
CURVEBALLIt may cause a strike
CURVEBALLPitch that fixes everything?
CURVEBALLDelivery that could lead to a strike
curveballa baseball pitch thrown with spin to make it curve / to throw such a ball
curveballA ball that is pitched with a snap of the wrist and a strong downward spin, which causes the ball to drop suddenly and deceptively veer away from home plate