Link with a space station (4)
I believe the answer is:
'link with a space station' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dock that I've seen before include "Remove or shorten an animal's tail" , "Boat mooringd" , "Where the accused stands in court" , "Harbour" , "Court enclosure; weed" .)