The Wizard of Oz heroine (7)
I believe the answer is:
dorothy
'the wizard of oz heroine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dorothy that I've seen before include "Female" , "Name of the young heroine in 'The Wizard of Oz'" , "'Wizard of Oz' girl" , "Girl from Kansas" , "Wizard of Oz child" .)