The ornamental design for a pocketportion of a scarf of a travelsupportstructure, as shown and described.
FIG. 1 is a front perspective view of the front side of a pocket portion of a scarf of a travel support structure in use arranged around a neck of a person showing a new design;
FIG. 2 is a quarter turn perspective view thereof; and,
FIG. 3 is a plan view of the back side in a flat position thereof.
In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.