Clamp

FIG. 1 is a front view of the clamp according to the claimed design, with a hinge of the clamp in an open position; FIG. 2 is a rear view of the clamp according to the claimed design, with the hinge of the clamp in an open position; FIG. 3 is a top view of the clamp according to the claimed design, with the hinge of the clamp in an open position; FIG. 4 is a bottom view of the clamp according to the claimed design, with the hinge of the clamp in an open position; FIG. 5 is a right view of the clamp according to the claimed design, with the hinge of the clamp in an open position; FIG. 6 is a left view of the clamp according to the claimed design, with the hinge of the clamp in an open position; FIG. 7 is a top-left front perspective view of the clamp according to the claimed design, with the hinge of the clamp in an open position; and, FIG. 8 is a top-right front perspective view of the clamp according to the claimed design, with the hinge of the clamp in an open position. The broken lines in FIGS. 1 - 8 depict portions of the clamp that form no part of the claimed design.