Vindictiveness (5)
I believe the answer is:
spite
'vindictiveness' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spite that I've seen before include "animosity" , "Malicious desire to hurt or humiliate" , "Bitchiness or malice" , "Desire to intentionally and maliciously hurt or offend" , "Venom" .)