The ornamental design for the clip shade, as shown and described.
FIG. 1 is a front view of the clip shade showing my new design;
FIG. 2 is a right side view thereof, with the left side view being a mirror image;
FIG. 3 is a rear view thereof;
FIG. 4 is an enlarged top view thereof;
FIG. 5 is an enlarged bottom view thereof; and,
FIG. 6 is an enlarged perspective view of the clip shade shown in use, wherein the broken lines showing the light bulb are for illustrative purposes only and form no part of the claimed design.