The ornamental design for a headportion of plushtoy, as shown and described.
FIG. 1 is a front perspective view of a head portion of plush toy;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof, the right side elevation view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a front elevation view thereof, shown in use.
The broken lines shown in the FIG. 6 that are centrally disposed and oval in shape represent the bounds of the claimed design while all other broken lines in the drawings depict portions of the head portion of plush toy that form no part of the claimed design.