Hide the port (7)
I believe the answer is:
harbour
I believe this is a double definition.
'hide' is the first definition.
(as in harbouring a fugitive)
'the port' is the second definition.
(harbour is a kind of port)
(Other definitions for harbour that I've seen before include "Nurse" , "Shelter for ships" , "Hide - entertain - port" , "Keep (thought) secretly (in one's mind); haven" , "Safe mooring for ships" .)