Miss Doolittle (5)
I believe the answer is:
eliza
'miss doolittle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for eliza that I've seen before include "girl" , "Miss Doolittle/s first name" , "woman" , "- Doolittle (Pygmalion)" , "Henry Higgins' protege (My Fair Lady)" .)