FIG. 1 is a front view of a first embodiment of an icon for a portion of a display screen showing my new design;

FIG. 2 is a front view of a second embodiment thereof; and,

FIG. 3 is a front view of a third embodiment thereof.

The broken line drawing of a portion of a display screen and the broken line drawing of the words, numbers, and typographic symbols in all views are for illustrative purposes only and form no part of the claimed design. The words in solid lines are part of the claimed design as described in the third embodiment, FIG. 3.