Lose one's temper (3,3,3,6)
I think it could be either:
fly off the handle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lose one's temper</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 fly off the handle that I've seen before include "Lose one's temper" , "Robin perching on spade may" , "See red" , "react angrily" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lose one's 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 see red that I've seen before include "Lose temper as bull might" , "Lose temper colourfully, as bull does (3.3)" , "Lose temper like enraged bull" , "Grow furious" , "Burst a blood vessel" .)