Covering up not criminal case? Having more to say (6)
I believe the answer is:
adding
'covering up not criminal case?' is the definition.
The answer and definition can be both to do with communicating as well as being present participle verbs.
Perhaps there's an association between them I don't understand?
'more to say' is the wordplay.
'more' becomes 'ing' (I can't explain this - if you can you should give a lot more credence to this answer).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'say' becomes 'add' (adding is a kind of saying).
'ing' after 'add' is 'ADDING'.
'having' is the link.
Can you help me to learn more?
(Other definitions for adding that I've seen before include "increasing it by" , "Totalling" , "Totting" , "Appending" , "Putting in" .)