Pacifist (7)
I believe the answer is:
antiwar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pacifist</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for antiwar that I've seen before include "of the Pacific class" , "pacifist" , "opposed to aggression" , "Promoting peace" , "like a dove" .)