Hepburn of "My Fair Lady" (6)
I believe the answer is:
audrey
'hepburn of my fair lady' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for audrey that I've seen before include "- Hepburn, British actress (My Fair Lady)" , "- Hepburn, twentieth century actress" , "Girl's name; rue day (anag.)" , "Girl" .)