Doomed person (5)
I believe the answer is:
goner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">doomed person</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for goner that I've seen before include "Hopeless case" , "One beyond help" , "One dead or beyond hope of recovery" , "Someone beyond any hope of recovery" , "Something beyond any chance of recovery" .)