Export Mesh and Motion Individually

For some reason, iClone 8 can only export animation with mesh together.

But Character Creator 4 can export only the animation without meshes.

If you want to export the animation from iClone 8 by using Character Creator 4, please try the following steps:

Saving motion clip directly:
https://manual.reallusion.com/iClone-8/Content/ENU/8.0/51-Animation-Timeline-Editing/Saving_Clips.htm

Or bake the animation and save the motion clip by using Collect Clip Track:
https://manual.reallusion.com/iClone-8/Content/ENU/8.0/51-Animation-Timeline-Editing/Collect_Clip_Track.htm

Then open Character Creator 4 > Apply a character into the viewport > Apply the motion clip of above steps > go to File menu > Export FBX > Now you can export only animation..
See the manual page here: https://manual.reallusion.com/Character-Creator-4/Content/ENU/4.0/17_Export/Exporting_Mesh_and_Motion_Individually.htm