For use with a percussion instrument, the combination comprises a clamp base to support the percussion instrument, a clamp jaw, adjustable connector structure connecting the jaw to the base for displacing the jaw toward and away from the base, and clamping structure carried on at least one of the jaw and the base to be clamped against a support member in response to relative clamping displacement of the jaw and base, whereby adjustment of the structure accommodates to clamping of different size support members by clamping structure.