We claim the ornamental design for a display clip, as shown and described.
FIG. 1 is a top front perspective view of the claimed design;
FIG. 2 is a bottom rear 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, the right view being a mirror image thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The article is shown with symbolic break in its length. The appearance of any portion of the article between the wavy break lines forms no part of the claimed design.