Working stiff from Haiti (6)
I believe the answer is:
zombie
This clue might be a double definition.
'working stiff' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'haiti' is the second definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'from' is the link.
(Other definitions for zombie that I've seen before include "Dead body brought back to life" , "Corpse said to have been revived by witchcraft" , "Automaton" , "Undead monster" , "Walking corpse" .)