CAD tip # 4777:

There are several ways to do this - e.g.:

1. Use XCLIP with a 'keyhole' type of the clipping polyline (a narrow path from outside to the inside isle)
2. Instead of XCLIP use a WIPEOUT to wipe the inside hole (the usage is not limited to xrefs)
3. Use MVIEW with regions in a layout. Draw the outside polygon, draw the inside polyline/isle, make REGIONs from both of the polylines and SUBTRACT them. Use the resulting region as a clipping object for your MVIEW.