I think your just reading too fast
Let's break down the bolded part:
Hypo x Clown het hypo
All animals from that breeding are either hypo or het hypo, and all are het for clown.
If he were to breed one of those hypos back to the parent Clown het hypo...
Hypo het clown x Clown het Hypo
YES, he could get Hypo Clowns.![]()