Thief! User! Out getting vengeful women (3,6)
I believe the answer is:
the furies
'vengeful women' is the definition.
Although both the answer and definition are plural nouns, I cannot see how one could define the other.
'thief user out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'thief'+'user'='thiefuser'
'thiefuser' with letters rearranged gives 'THE FURIES'.
'getting' acts as a link.
Can you help me to learn more?
(Another definition for the furies that I've seen is " Goddesses".)