I have to agree Priscilla was talking about Clare's scent. I don't know if it's because of Teresa, though, and sort of doubt it. Remember Priscilla didn't kill Clare back then, so there's something special about her that is bothering Priss.
I initially thought Priscilla tore off Clare's awakened limbs, but the text at the end seems to say that didn't happen.
Also, it's hilarious Helen and Deneve are treating Priscilla like a potential threat without any sense of her capacity. The Claymores were always terrified of Isley and Riful, and here we've got a monster worse than them and they're only at danger sense level one, for example. Engage the enemy cautiously.
Wait until Priss blows her youki!