Island nation: it's secured by endless locks (5)

I believe the answer is:

haiti

(Other definitions for haiti that I've seen before include "Island of West Indies" , "Caribbean country, capital Port-au-Prince" , "Western half of Hispaniola" , "West Indies country, capital Port-au-Prince" , "Western part of island discovered by Columbus in 1492" .)

I've seen this clue in The Sun.

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