Wharf or pier (4)
I believe the answer is:
dock
I believe this clue is a double definition.
'wharf' is the first definition.
(synonyms)
'pier' is the second definition.
(I know that pier can be written as dock)
(Other definitions for dock that I've seen before include "area of court" , "Where ships tie up" , "Boat mooringd" , "Type of broad-leaved weed" , "Where one might repair cutter" .)