Roman god of war (4)
I believe the answer is:
mars
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roman god of war</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 mars that I've seen before include "March to the French" , "Famous Texas mission" , "bar....that's sweet!" , "Roman war god; planet" , "War god - chocolate bar - spoils" .)