The ornamental design for a golfclubhead, as shown and described.
FIG. 1 is a front elevational view embodying the inventive design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a heel-side elevational view thereof;
FIG. 4 is a toe-side elevational view thereof;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a bottom, rear perspective view thereof.
The dot-dash chain lines represent a boundary of the claimed subject matter. The broken lines are directed to environment and are for illustrative purposes only. The dot-dash chain lines and the broken lines form no part of the claimed design.