Abstract: A training/playing aid for clamping on the shaft of a golf club for use in the measurement of movement in degrees that a golfer comes over the top of the ball at impact. Upon measurement of this movement, the training/playing aid is adjusted making it possible to position the golfer in a correct golf ball addressing stance. The training/playing aid comprises an elongated arm having a clamp at one end for securing the arm to the shaft of the golf club to extend laterally thereof. The clamp comprises a cylindrical shell having an opening at one side for clamping on the shaft of the golf club. The arm is streamlined with a streamlined pointer movably mounted on the arm of the golf club in a direction parallel with the head of the club with the pointer aligned with the "sweet spot" of the golf club.