Abandoned port (4)
I believe the answer is:
left
This clue is a double definition.
'abandoned' is the first definition.
(thesaurus)
'port' is the second definition.
('left' is associated in meaning with 'port')
(Other definitions for left that I've seen before include "Withdrew - Labour" , "quit" , "Socialist direction" , "Gone away - remaining" , "political grouping" .)