Roman goddess of war (7)
I believe the answer is:
bellona
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roman goddess of war</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bellona that I've seen before include "Roman goddess of war" , "Roman god of war" .)