Purim heroine
I believe the answer is:
esther
'purim heroine' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for esther that I've seen before include "OT Queen of Persia" , "Good book" , "Beautiful lady" , "Old Testament book telling of a beautiful Jewess" , "Biblical heroine who became queen of Persia" .)