Rabbit chaser of fiction (5)
I believe the answer is:
alice
'rabbit chaser of fiction' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alice that I've seen before include "She fell down a rabbit hole into a fantasy world" , "Looking-glass girl" , "Movement" , "Lewis Carroll's immortal girl" , "Girl famous for entering Wonderland" .)