If the Seahawks use Clowney as they should use him it will be him.
If they think he's an edge rusher it will be Ansah.
TBF what they're doing with Clowney on passing downs is one of the things I'll be paying most attention to, as PC isn't really known for his creativity in defensive scheming.
So for example, if it's third and long is he gonna let Clowney swap and rush from a two-point stance over a guard, or is he gonna try to always fit Clowney's round peg into his square hole and just have him on a wide 9 in a three point stance? If he just tries to sub Clowney into what Clark was asked to do I don't think that's gonna work and it's going to be a waste.