Clown x Super P

[Schlyne]

so to get the killer clown you need either..

1.1 pastel het clown

1.0 pastel clown x 0.1 pastel = Super P het clown which goes back to the original clown? Is that possible?

Yes, you could have a super pastel which is het for clown to bred to a pastel clown or a pastel het for clown.