Beat the line together. The passer disguises and weights it past the defender; the runner times his run to stay onside and take it in behind.
As the base, but a live defender holds the line. Emphasise the timing between the pass and the run to beat the line, disguise, and weight into space. The defender holds and can step up. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.