Docking spots (6)
I believe the answer is:
berths
'docking spots' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for berths that I've seen before include "Spaces in port for ships and boats" , "Beds on ships or trains" , "Beds on boats" , "Ships' moorings" , "Beds in cabins" .)