Old fish market’s scandal over presentation of accounts? (12)
I believe the answer is:
billingsgate
'presentation of accounts?' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'old fish market's scandal' is the wordplay.
'old fish market' becomes 'billings' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'scandal' becomes 'gate' (as in Watergate and other formations).
'billings'+'gate'='BILLINGSGATE'
'over' acts as a link.
Can you help me to learn more?
(Other definitions for billingsgate that I've seen before include "London fish market" , "Swearing" .)