I understand. The oral is now over (6,4)
I believe the answer is:
enough said
'i understand the oral is now over' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'i understand the oral is now over' is the wordplay.
'understand the oral' becomes 'enoughs' (I can't explain this - if you can you should believe this answer much more).
'is now' becomes 'AD' (AD, Anno Domini, as opposed to BC, Before Christ).
'over' indicates putting letters inside.
'enoughs'+'ad'='enoughsad'
'i' placed inside 'enoughsad' is 'ENOUGH SAID'.
Can you help me to learn more?
(Other definitions for enough said that I've seen before include "No need for comment" , "there's nothing to add" .)