Reports from all quarters (4)
I believe the answer is:
news
'reports from all quarters' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'all quarters' is the wordplay.
'all' becomes 'ne' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'quarters' becomes 'ws'.
'ne'+'ws'='NEWS'
Can you help me to learn more?
(Other definitions for news that I've seen before include "Reports of recent events" , "Fresh information" , "Intelligence, information" , "Four points" , "Broadcast detailing recent events" .)