Sullen, touchy (5)
I believe the answer is:
moody
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">sullen</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">touchy</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for moody that I've seen before include "Down in the dumps" , "Liable to sulking" , "Mercurial" , "Temperamental -- capricious" , "American evangelist" .)