The ornamental design for a portion of accordion with graphical design, as shown and described.
FIG. 1 is an enlarged view of my new design for a portion of accordion with graphical design shown in FIG. 2; and,
FIG. 2 is a front view thereof.
The broken lines represent environment only and form no part of the claimed design. The dot-dash lines represent the boundaries that form no part of the claimed design.