Senior journalist could turn the tide or add to it (6)
I believe the answer is:
editor
'senior journalist' is the definition.
(I've seen this before)
'turn the tide or add to it' is the wordplay.
'tide or' anagrams to 'EDITOR'.
However, I am unsure how the anagram is indicated.
'could' acts as a link.
Can you help me to learn more?
(Other definitions for editor that I've seen before include "Person in charge of a publication" , "One who revises another's writing" , "Redactor" , "Journalist - rioted (anag)" , "Head of a newspaper say" .)