Tied up, as a ship
I believe the answer is:
moored
'tied up as a ship' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for moored that I've seen before include "Of boat, secured by rope to shore" , "Tied up to berth like ship or boat" , "Secured by rope or cable" , "Of boat, tied up or secured" , "Fastened with a line or anchored" .)