Cranky
I believe the answer is:
irritable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cranky</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cranky can be written as irritable)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for irritable that I've seen before include "Testy" , "Bad-tempered" , "Crabby" , "Cantankerous" , "Touchy" .)