Morose, moody (6)
I believe the answer is:
sullen
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">morose</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">moody</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for sullen that I've seen before include "Glowering silently" , "Gloomy and resentful" , "Morose, sulky" , "Dour" , "Gloomy and bad-tempered" .)