Port of Spain, where you can't get caught in a lie! (8)
I believe the answer is:
alicante
'port' is the definition.
(I have seen 'Spanish port ' mean 'alicante' so perhaps 'port' could also mean 'alicante')
'caught in a lie' is the wordplay.
'caught' becomes 'cant' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'a'+'lie'='alie'
'cant' going inside 'alie' is 'ALICANTE'.
'of spain where you can't get' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for alicante that I've seen before include "Spanish resort" , "Spanish location" , "European resort" , "foreign port" , "in Iberia" .)