Fasten round the neck (3)
I believe the answer is:
tie
This clue might be a double definition.
'fasten' is the first definition.
(I know that fasten is a more specific form of attach)
'the neck' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'round' is the link.
Can you help me to learn more?
(Other definitions for tie that I've seen before include "Attach, fasten" , "Draw; link" , "Knot; achieve the same score" , "Bind with a cord" , "Fasten a parcel" .)