Faintness (7)
I believe the answer is:
languor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">faintness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for languor that I've seen before include "Weakness - sluggishness" , "Lack of vitality, listlessness" , "Dreamy inactivity" , "sloth" , "tender softness" .)