Irascible, short-tempered (5)
I believe the answer is:
testy
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">irascible</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">short-tempered</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for testy that I've seen before include "Irritably impatient" , "likely to flare up?" , "Captious" , "Easily irritated" , "Quick to anger" .)