White Rabbit pursuer (5)
I believe the answer is:
alice
'white rabbit pursuer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alice that I've seen before include "Celia (anag.)" , "Wonderland heroine" , "Lewis Carroll character" , "Girl famed for Wonderland adventures" , "Lewis Carroll's heroine" .)