Council crime not even mentioned (5)
I believe the answer is:
synod
'council' is the definition.
(I know that Synod is a type of council)
'crime not even mentioned' is the wordplay.
I cannot really see how this works, but
'not' could be 'no' (I've seen this in other clues) and 'no' is found 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 synod that I've seen before include "Ecumenical council" , "Church assembly" , "Ecclesiastical assembly" , "Clerical assembly" , "group of clergymen" .)