Tied up (8)
'tied up' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tethered that I've seen before include "Tied (animals) up" , "Confined in range by tied rope" , "Not free" , "on a leash" , "Of animal, secured or hobbled" .)
'tied up' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for moored that I've seen before include "Fastened with a line or anchored" , "Secured by rope or cable" , "Made fast" , "Of boat, secured by rope to shore" , "Berthed, tied up" .)