Strongly against (4)
I believe the answer is:
anti
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strongly against</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for anti that I've seen before include "Hostile" , "An opponent - opposed to party policy, etc" , "Who pooh-poohs all" , "(Person who is) not in favour" , "one opposing?" .)