You can switch the sprite to another (empty) frame or animation.
Or use this to clear the image:
SnapshotSprite: Load image from "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVQYV2NgYAAAAAMAAWgmWQ0AAAAASUVORK5CYII=" (Keep current size, cross-origin anonymous)