Tell off and make a very good case again? (7)
I believe the answer is:
reprove
'tell' is the definition.
(thesaurus)
'off and make a very good case again?' is the wordplay.
I cannot really see how this works, but
'very' could be 'v' (abbreviation) and 'v' is found within the answer.
'again?' could be 're' (prefix meaning 'again') and 're' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for reprove that I've seen before include "carpet" , "Scold" , "Admonish" , "Rebuke, censure" , "To remonstrate" .)