The ornamental design for an outsole for a shoe, as shown and described.
FIG. 1 is a bottom perspective view of an outsole for a shoe in accordance with my new design;
FIG. 2 is a bottom view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is an enlarged perspective view of the area labeled “7” in FIG. 1.
The broken lines shown in each arch area of FIGS. 1–4 represent boundaries of the design with the lines themselves and the areas within them forming no part of the claim.