A port out East that's simply paradise (6)
I believe the answer is:
heaven
'paradise' is the definition.
(I know that paradise can be written as heaven)
'a port out east' is the wordplay.
'a port' becomes 'haven' (both can mean a place of safety).
'out' means one lot of letters goes inside another.
'east' becomes 'e' (abbreviation).
'haven' going around 'e' is 'HEAVEN'.
'that's simply' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for heaven that I've seen before include "Happy place" , "Paradise, utopia" , "The abode of God in many religions" , "Realm of eternal bliss" , "ecstasy" .)