Cross swords (5)
I believe the answer is:
clash
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cross swords</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 clash that I've seen before include "Conflict, discord" , "Punk group; disagree" , "jar" , "Forceful disagreement" , "Conflict, between colours say" .)