clip-path-use-referencing-text.html

<!DOCTYPE html>
<script src="../../resources/ahem.js"></script>
<svg>
  <defs>
    <text id="text" y="80" font-size="100" font-family="Ahem">X</text>
    <clipPath id="clip">
      <use xlink:href="#text"/>
    </clipPath>
  </defs>
  <rect width="200" height="100" fill="green" clip-path="url(#clip)"/>
</svg>

chromium/third_party/blink/web_tests/svg/clip-path/clip-path-use-referencing-text.html