Public fighting (6)
I believe the answer is:
affray
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">public fighting</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 affray that I've seen before include "Fish; had an odour" , "Disturbance of the peace" , "Brawl, disturbance" , "Breach of the peace by public rioting" , "Fracas, noisy fight" .)