Frenzied female
I believe the answer is:
'frenzied female' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for maenad that I've seen before include "A raging woman, once a follower or Dionysus" , "woman in a frenzy" , "Female votary of Dionysus or a wild woman" , "Frenzied female" , "Female fan of Bacchus" .)