Ship's framework seen in port (4)
I believe the answer is:
hull
This clue is a double definition.
'ship's framework' is the first definition.
(I've seen this in another clue)
'port' is the second definition.
(I know that Hull is a port)
'seen in' acts as a link.
(Other definitions for hull that I've seen before include "Framework of ship" , "Conscious" , "Shell; a port" , "North-eastern port" , "Humber university" .)