Port-au-Prince's nation (5)
I believe the answer is:
haiti
'port-au-prince's nation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for haiti that I've seen before include "West part of Hispaniola" , "West Indies country associated with voodoo" , "foreign state" , "Caribbean state" , "Country occupying part of Hispaniola" .)