<svg xmlns="http://www.w3.org/2000/svg">
<clipPath id="clip1">
  <!-- fill-rule must not affect the winding rule for clipping -->
  <polygon points="0 0, 150 0, 150 150, 0 150, 0 25, 125 25, 125 125, 25 125, 25 25, 0 25" fill-rule="evenodd"/>
</clipPath>
<rect x="0" y="0" height="200" width="200" fill="green" clip-path="url(#clip1)"/>
</svg>