...with Tory repeatedly exposed following set-up from French journalist (6)
I believe the answer is:
editor
'french journalist' is the definition.
'editor' can be an answer for 'journalist' (senior journalist). I am not sure about the 'french' bit.
'with tory repeatedly exposed following set-up' is the wordplay.
'tory repeatedly' can mean two replacements for 'tory'.
'with' means one lot of letters go next to another.
'tory' becomes 'edit' (I am not sure about this - if you are sure you should believe this answer much more).
'tory' becomes 'r' (abbreviation for right).
'exposed' says to take the centre (outside letters removed).
'set up' is a reversal indicator (in a down clue, letters go up).
The middle of 'following' is 'o'.
'r'+'o'='ro'
'ro' in reverse letter order is 'or'.
'edit' next to 'or' is 'EDITOR'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for editor that I've seen before include "Rag worker" , "Person who determines the final content of a text" , "One is responsible for publication" , "One expected to make final" , "Redo it and become head of publication" .)