See 184.108.40.206 and 220.127.116.11 also.
Units cannot bypass through a unit under a Clearing Marker. However you could reinforce the units under the clearing marker and thus pull units out without removing the Clearing Marker as long as you don't withdraw the units into an EZOC.
Thanks for those clarifications and tips.
Also, I'm assuming that since a hex under a clearing marker is still an enemy controlled city, urban, or installation, that no supply LOC can be traced through it?