I did a quick test with CC 2.3 hair, and although it does export and load in iClone 6.5, I found the visual result much less than in CC 2.3. (Sometimes it also does not export the weight map for the hair, but that is easily fixed by exporting the weight map out of CC.)
This is the hair in CC 2.3:
And this is what I get in iClone 6.5:
So the difference is quite substantial. In addition, there is also a certain shimmering effect with this particular hair. There may be ways to make it look a bit better. I haven't used iClone 6.5 in a long time.
All I can hope is that you find the funds to upgrade as the visual improvements are definitely noticeable.