Antagonism (6)
(Other definitions for animus that I've seen before include "spirit of hostility" , "Motivating spirit" , "Hostile feeling" , "Hostile spirit in speech or action" , "Feeling of strong dislike" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">antagonism</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that antagonism can be written as enmity)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for enmity that I've seen before include "discord" , "Hatred, hostility" , "Personal hostility" , "Animus" , "Hostility, ill-will" .)
(Other definitions for ill will that I've seen before include "Enmity" , "Hostile and unkind feeling" , "Hostility, unkind feeling" , "Disposition of enemy" , "Bitterness" .)