Finally doesn't finish volume (5)
I believe the answer is:
atlas
'volume' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'finally doesn't finish' is the wordplay.
'finally' becomes 'at last' (synonyms).
'doesn't finish' means to remove the last letter.
'atlast' with its final letter taken away is 'ATLAS'.
Can you help me to learn more?
(Other definitions for atlas that I've seen before include "Map collection" , "Supporter of the classics" , "Book of maps - fifteenth satellite of Jupiter" , "Holder of world" , "One greatly burdened" .)