Mixamo issue, skin comes through my clothing when applying an animation

After exporting my character from Fuse and uploading to Mixamo, I was happy with how he looked in the T Position.

But when I apply an animation, this happens:

As you can see from the pictures, his skin comes through the clothing in certain areas (Shoulders, Arms and Legs)
How can I fix this?
If I can’t, how do other people use Mixamo and make their characters look so perfect :frowning: