Jocelyn —, author of novels The Dog at Clambercrown and The Scapegoat (6)
I believe the answer is:
brooke
(Other definitions for brooke that I've seen before include "See 1" , "Rupert -, poet killed in world war one" , "Versifying Rupert" , "one called Rupert" , "Rupert __ , poet, d.1915" .)