One of the main issues for character creators is how to get clothing you've made (modeled/built in other programs) onto your CC Characters. I call this "Conforming" clothing to the character. You can call it whatever you like. Like many of us, I'm crossing my fingers RL addresses this much-needed feature in a coming software update of iClone / Character Creator.
But until then, here's a look at several methods employed by other software packages. (Feel free to try these at home!) :)
In DAZ: DAZ has crafted a simple solution for getting clothes onto an avatar. Sadly it is not possible to do this with CC avatars, since DAZ does not readily import fully rigged FBX characters.
In BLENDER: You can attempt the traditional method of parenting your clothing mesh to the skeleton rig, then transferring weights as shown in this video. I liken this to carving in stone, and would rather have my hair set on fire.
:w00t:in 3DS MAX: This looks like one of the ways you can actually Conform clothing outside of iClone. Alas, a copy of 3DS Max (or Maya) will cost you $185.00 USD per month.
in SPECIES: Clara.io developer, Exocortex, has a proprietary character creation system called "Species," which costs $299.00 USD. Here's a look at how they do it:

So RL, I hope you're keeping track of this issue and working to give us a tool we can use really soon! Cheers!