Journalist pursued diamond article in vessel that disturbed the status quo (6,3,4)
I believe the answer is:
rocked the boat
'disturbed the status quo' is the definition.
I know nothing about this answer so I can't tell whether this works.
'journalist pursued diamond article in vessel' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'pursued' means one lot of letters go next to another.
'diamond' becomes 'rock' (rock can informally mean a diamond).
'article' becomes 'the' (the definite article in English).
'in vessel' becomes 'boat' (I can't justify this - if you can you should give a lot more credence to this answer).
'ed' put after 'rock' is 'rocked'.
'rocked'+'the'+'boat'='ROCKED THE BOAT'
'that' acts as a link.
Can you help me to learn more?
(Another definition for rocked the boat that I've seen is " Created trouble in existing situation".)