The way I always do it is (either using iClone7&CC3 or iClone8&CC4):
1. Create a character in CC(4) or load a character directly into iClone (eg from ActorCore)
2. Create my animations. Either in one file or in separate files.
3. Use the Collect Clip in the TimeLine to select each animation clip, one-by-one
4. With an animation thus selected right-click on the Collect Clip selection and choose either Add Motion to Library or Add MotionPlus to Library. Save the animation files to any folder you want.
5. In CC(4) load your character (can come from iClone ofc) and goto File--Export-Clothed Character
6. Select the Unity3D preset. Choose Mesh&Motion (you can do Motion only if you want to separate the character mesh from the animations). In the Animations section choose Custom and load (you can select multiple) your saved animations.
7. Export the FBX to your Unity Asset folder (or some other ofc and drop it in from there)
8. Once Unity has imported the FBX the best thing to do (especially when using the URP or HDRP SRP) is to install the Soupday package (
https://github.com/soupday ) that let's you convert the CC character perfectly in Unity! A must have IMHO.
9. If using the Converter, then open it, select your FBX and click build materials. This will include an Animator component. Set the Rig, etc.
10. If not using the Converter, then you will have to manually set the FBX import.
11. Now your animations are either in your FBX (when not using the Converter) or in the Animations folder that was created after converting.
12. Drop and drop the animations into your Animator. Create transition. Create some code and PRESTO!