The ornamental design for a grill with transparentcover, as shown and described.
FIG. 1 is a top, front, right-side perspective view of a grill with transparent cover showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being mirror symmetrical thereto except for an electrical connector provided thereon; and,