Charged for a small volume shown as secondhand (7)
I believe the answer is:
accused
'charged' is the definition.
('accuse' can be a synonym of 'charge')
'as secondhand' is the wordplay.
'as' becomes 'acc' (I can't justify this - if you can you should give a lot more credence to this answer).
'secondhand' becomes 'used' (synonyms).
'acc'+'used'='ACCUSED'
'for a small volume shown' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for accused that I've seen before include "The person in the dock" , "Defendant in a criminal proceeding" , "Indicted" , "He who stands in the dock" , "Blamed" .)