Criminal cases he finally came to drop? (7)
I believe the answer is:
hangman
'criminal cases he finally came to drop?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'criminal cases he' is the wordplay.
'criminal cases' becomes 'hang' (I can't justify this - if you can you should give a lot more credence to this answer).
'he' becomes 'man'.
'hang'+'man'='HANGMAN'
Can you help me to learn more?
(Other definitions for hangman that I've seen before include "He suspends" , "wordgame?" , "Official executioner" , "Word game - executioner" , "official suspending offenders" .)