Clamp

FIG. 1 is a top front perspective view of a clamp showing our new and ornamental design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an opposite side view thereof.

The broken lines in the drawings depict portions of the clamp that form no part of the claimed design.