Moribund (5)
I believe the answer is:
dying
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">moribund</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dying that I've seen before include "Coluring, hair or fabric" , "On the way out" , "Starting to stop!" , "Coming to an end" , "Perishing" .)