Doomed person (informal) (5)
I believe the answer is:
goner
(Other definitions for goner that I've seen before include "Dead loss" , "Hopeless case" , "Nasty princess" , "toast" , "Person beyond saving" .)
I believe the answer is:
goner
(Other definitions for goner that I've seen before include "Dead loss" , "Hopeless case" , "Nasty princess" , "toast" , "Person beyond saving" .)