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 the new design;
FIG. 2 is a front view of a display screen with icon showing alternative disclaimed environment;
FIG. 3 is a front view of display screen with icon of FIG. 1 shown on a device; and,
FIG. 4 is a front view of display screen with icon of FIG. 2 shown on a device.
The broken line showing of the skateboard and remainder of the display screen in FIGS. 1-4, and the remainder of the device in FIGS. 3-4 is for environmental purposes only and forms no part of the claimed design.