Bit of a tiff (4)
I believe the answer is:
spat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bit of a tiff</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 spat that I've seen before include "Spoke violently" , "Made gesture of contempt" , "Disagreement" , "A small tiff or quarrel" , "Taps in minor quarrel" .)