Portion of a vacuum cleaner

FIG. 1 is a front and right-side perspective view of a portion of a vacuum cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is an enlarged top view thereof.

The broken lines in the figures illustrate the boundaries of the claim, and form no part of the claimed design.