Sluggish, listless (9)
I believe the answer is:
lethargic
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">sluggish</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">listless</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for lethargic that I've seen before include "Lackadaisical" , "reluctant to move" , "lack of energy" , "Sluggish and apathetic" , "The garlic (anag.)" .)