See testcase:

So far the following results:

• overflow: clip (and contain: paint) clip scrollable overflow
• clip-path does not clip scrollable overflow in FF, WK, or Blink
  • Side note: Blink doesn't seem to support the full syntax of clip-path, e.g. border-box doesn't work >:/
• clip does not have interop on this point

Is this the behavior we want?