Grounds to follow part in journalism (6,6)
I believe the answer is:
fourth estate
'journalism' is the definition.
(synonyms)
'grounds to follow part' is the wordplay.
'grounds' becomes 'estate' (I've seen this before).
'to' says to put letters next to each other (I've seen this in other clues).
'follow part' becomes 'fourth' (I can't justify this - if you can you should give a lot more credence to this answer).
'estate' after 'fourth' is 'FOURTH ESTATE'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for fourth estate that I've seen before include "addition to three-car family?" , "Journalistic profession - press" .)