Bitchiness or malice (5)
I believe the answer is:
spite
This clue is a double definition.
'bitchiness' is the first definition.
(thesaurus)
'malice' is the second definition.
(spite is a kind of malice)
(Other definitions for spite that I've seen before include "Malicious desire to hurt or humiliate" , "Hatred" , "Desire to intentionally and maliciously hurt or offend" , "Rancour" , "Desire to hurt or annoy" .)