Military conflict or struggle (7)
I believe the answer is:
warfare
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">military conflict</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">struggle</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that warfare is a type of struggle)</span><br/ ><br/ ></span>
(Other definitions for warfare that I've seen before include "action" , "Armed conflict" , "All-out fighting" , "Strife" , "Campaigning" .)