When I brought it into CC I loaded it onto the base male character and it conformed reasonably to that character
Then I tried loading it onto the heavy male character and it did not conform very well.

I tried exporting the heavy base male as fbx from CC and adding the clothing in blender but I had problems bringing that character back into CC
So I sent the heavy base male character with the horribly conformed shendyt into iClone and then into 3DXchange
I then exported the characters mesh and the shendyt mesh as an obj in the replace mesh section of the modify panel
Loaded the character OBJ and the Shendyt OBJ into Blender
Moved the Shendyt's vertices around until it fitted better.(no need to touch the weight mapping or the UV mapping)
Exported the Shendyts OBJ from Blender and then replaced the Shendyt in 3DXchange with the modified version I just saved
Sent the chacter and the much better fitting Shendyt back to iclone and then sent it from iclone to CC, re-enabled the appearance texture made it look how I wanted and then saved the Shendyt with 4HeavyMale in the name.

Might not be the best way to do it but it worked and that is what matters most to me.
I did try modifying the mesh in CC before I did all of that but ended up wishing I could modify it like I could in Blender........so that's what I did