<svg xmlns="http://www.w3.org/2000/svg"	xmlns:xlink="http://www.w3.org/1999/xlink" clip-path="url(#clip-circle)">
<defs>
    <clipPath id="clip-circle">
        <circle cx="60" cy="60" r="50"/>
    </clipPath>
</defs>
<rect id="rect" x="10" y="10" width="100" height="100" fill="green"/>
</svg>