Wonderland heroine (5)
I believe the answer is:
alice
'wonderland heroine' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for alice that I've seen before include "She fell down a rabbit hole into a fantasy world" , "Adventurous girl created by Lewis Carroll" , "Wonderland girl's name" , "woman" , "Miss Liddell" .)