The ornamental design for a displayscreen with icon, as shown and described.
FIG. 1 is a front view of a display screen with icon showing our new design;
FIG. 2 is a front view of a display screen with icon showing an alternative embodiment of our new design;
FIG. 3 is a front view of the display screen with icon of FIG. 1 shown on a display device; and,
FIG. 4 is a front view of the display screen with icon of FIG. 2 shown on a display device.
The broken line showing the display screen forms no part of the claimed design. The dot-dash broken line in FIGS. 3 and 4 showing the display device is for environmental purposes and forms no part of the claimed design.