Tied up at Greenwich or in the Dome, possibly (6)
I believe the answer is:
moored
'tied up' is the definition.
(I've seen this in another clue)
'greenwich or in the dome possibly' is the wordplay.
I cannot really see how this works, but
'or' is found in the answer.
an anagram of 'dome' is 'moed' which is located in the left over letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'at' is the link.
Can you help me to learn more?
(Other definitions for moored that I've seen before include "Berthed, tied up" , "Made fast" , "Parked (of a boat)" , "Of boat, tied up or secured" , "Tied up to berth like ship or boat" .)