The ornamental design for a portion of a squeegee, as shown and described.
FIG. 1 is a perspective view of a portion of a squeegee in accordance with the present invention;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear perspective view thereof; and,
FIG. 4 is a side elevational view, the opposite side being a mirror image thereof.
The broken line showing of the head and the base of the handle is included for the purpose of illustrating other portions of the squeegee that form no part of the claimed design.