Fit of ill-temper (7)
I believe the answer is:
tantrum
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fit of ill-temper</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tantrum that I've seen before include "Fit of ill-temper" , "Pet, temper" , "Burst of rage" , "petulant outburst" , "Childish outbreak of temper" .)