The ornamental design for a displayscreen with icon, as shown and described.
FIG. 1 is a front view of a first embodiment of a display screen with icon showing my new design;
FIG. 2 is a front view of a second embodiment of a display screen with icon showing my new design; and,
FIG. 3 is a front view of a third embodiment of a display screen with icon showing my new design.
The outermost pair of broken lines illustrate a display screen and form no part of the claimed design. The remaining broken lines illustrate portions of the icon and form no part of the claimed design.