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 an alternative embodiment of the new design; and,
FIG. 3 is a front view of the display screen with icon of FIG. 1, showing the icon in smaller scale on a display screen.
The broken line showing the display screen forms no part of the claimed design. The dot-dash broken line in FIG. 3 forms no part of the claimed design.