The ornamental design for a golfclubhead for a putter, as shown and described.
FIG. 1 is a bottom perspective view of a golf club head for a putter showing our new design;
FIG. 2 is a bottom view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a toe end view thereof; and,
FIG. 7 is a heel end view thereof.
The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The broken lines showing the remainder of the golf club are for environmental purposes only and form no part of the claimed design.