Amycus was momentarily confused by Peter's question about Defense Against the Dark Arts before realizing that the boy was probably trying to fin out if that was a class he could help him with. Although he didn't care for the Defense part of the class he had continued in it rather than dropping it when he'd been given the opportunity to choose his own classes, believing that he would be better prepared to combat defensive techniques that he knew if it came to a duel.
He realized that Peter was still waiting for him to answer and he cleared his throat. "Yes I do," he said simply, turning to his notes and digging through them, looking for the ones pertaining to that class. "It's not my best class but I'm doing better than some in it," he explained, not looking up. "I'm much better in Charms," he said a bit of a smile playing around the edges of his mouth.