Vengeful goddess (4)
I believe the answer is:
hera
'vengeful goddess' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hera that I've seen before include "Regularly-deceived wife" , "Greek equivalent of Juno" , "female Greek deity" , "Greek queen of Olympian gods" , "Sister and wife of 18" .)