Adding and removing ZFS filesystems in Zones

I have a Solaris 10 container that is running on ZFS filesystems being presented from the Global Zone.

I have a filesystem presented to the Local zone and my user wants me to remove it.

It there any way I can remove this while the zone is running?

I tried unmounting it from the local zone and the global zone, all say device is busy. And I know I have to go into zonecfg and get it out of there too..

Any suggestions to remove this filesystem from a running zone?