Furiously angry (5)
I believe the answer is:
livid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">furiously angry</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 livid that I've seen before include "in a paddy" , "Spitting blood" , "Bloodless" , "Angry (person, bruise)" , "Really angry, the colour of lead" .)