You and I rose, for one backing Professor Lupin, say (8)
I believe the answer is:
werewolf
But I can't explain it at all! Could you help me understand?
(Other definitions for werewolf that I've seen before include "It's fabulous" , "hybrid" , "one bewitched" , "Person beleived to be able to assume lupine form" , "one who can become beastly" .)