Acrimonious (6)
'acrimonious' is the definition.
(I know that acrimonious can be written as bitter)
This is all the clue.
(Other definitions for bitter that I've seen before include "Acerbic" , "Resentful or angry through disappointment" , "drink" , "Unpalatable; a beer" , "Resentful about English beer?" .)
'acrimonious' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for rancorous that I've seen before include "Resentful, bitter" , "Acrimonious" , "Showing bitter resentment" , "spiteful?" .)