Anti-antis? (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">anti-antis?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pros that I've seen before include "Positive arguments" , "Yes votes" , "Persons with knowledge and skill" , "Arguments in favour" , "Opposites of cons" .)