The ornamental design for a weedguard having a swivel for a fishinglure, as shown and described.
FIG. 1 is a perspective view of the weed guard for a fishing lure;
FIG. 2 is a left elevational view of the weed guard;
FIG. 3 is a right elevational view of the weed guard;
FIG. 4 is a front elevational view of the weed guard, the front elevational view of the weed guard being a mirror image of a rear elevational view of the weed guard;
FIG. 5 is a top plan view of the weed guard, the top plan view of the weed guard being a mirror image of a bottom view of the weed guard; and,
FIG. 6 is a second perspective view of the weed guard connected to a fishing lure, the fishing lure being illustrated in broken lines being for illustrative purposes only and form no part of the claimed design.