The ornamental design for a clip, as shown and described.
FIG. 1 is a first perspective view of the clip showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The dash-dot-dash broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment. The broken lines form no part of the claimed design.