Minor quarrel (4)
I believe the answer is:
spat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">minor quarrel</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 spat that I've seen before include "cross words" , "Pat's involved in petty quarrel" , "Bickering" , "Minor conflict" , "Quarrel about petty point" .)