Can CCC clone a Fusion drive and restore it to a new SSD?
In answer to your question: YES.

By way of explanation... CCC makes a copy of the file system, which is independent of what physical drives the file system is on. for example you could make a clone of a boot drive on a RAID-5 array and then restore it to a single drive with no problems. 

The file system doesn't change just because it is on a different kind of physical media.