The capital of Trinidad and Tobago (4,2,5)
I believe the answer is:
port of spain
'the capital of trinidad and tobago' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for port of spain that I've seen before include "capital city" , "Caribbean city" , "Bilbao, for example" , "description of Barcelona" .)