take a look at Solutions Enabler Symmetrix TimeFinder product guide, search for "Fully restoring to anywhere"
Restore a timefinder snap to a clone:  Hi, I have snaps and clones associated with the same source LUN.  Snaps run more frequently than Clones.  Due to business reason, we have to restore a snap to a clone, then to the source LUN.  Is it possible to restore a snap to a clone?  Thanx.
Restore a timefinder snap to a clone