Volume in need of volume? (9)
I believe the answer is:
audiobook
'volume' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'need of volume?' is the wordplay.
'need of' becomes 'audio' (I can't explain this - if you can you should give a lot more credence to this answer).
'volume?' becomes 'book' ('book' can be a synonym of 'volume').
'audio'+'book'='AUDIOBOOK'
'in' is the link.
Can you help me to learn more?
(Another definition for audiobook that I've seen is " work, we hear".)