let a beast jump out of a hoop?

[Holger]

hello,
as a tribute to the German national soccer team (but indeed just for fun and learning even a bit more about Xara), I would like to let a colored beast jump out of a (soccer-like) hoop.
I have cut the hoop, and brought the one part to the back. It was the only way I could imagine to let the beast jump out of the hoop.
But now my problem is, that the dissected pieces each has a visible black edge (remarked with the red arrows).
is there any way to prevent such edge?
or now, after cutting it, to delete it or make it invisible?

thanks for help

Holger