The ornamental design for a supportingleg for a tray or the like, as shown.
FIG. 1 is an exploded perspective view of a supporting leg for a tray or
the like showing my new design, with three similar legs and a tray being
shown in broken lines to illustrate environmental use only;
FIG. 2 is an enlarged front elevational view;
FIG. 3 is a view looking from the right of FIG. 2;