English right infiltrated by the same heartless journalist (6)
I believe the answer is:
editor
'journalist' is the definition.
(thesaurus)
'english right infiltrated by the same heartless' is the wordplay.
'english' becomes 'e' (abbreviation).
'right' becomes 'r' (common abbreviation).
'infiltrated by' is an insertion indicator.
'the same' becomes 'ditto' (I've seen this before).
'heartless' suggests removing the centre.
'ditto' with its middle taken out is 'dito'.
'e'+'r'='er'
'er' placed around 'dito' is 'EDITOR'.
(Other definitions for editor that I've seen before include "Press boss" , "Redo it and become head of publication" , "Someone in the rag trade" , "The person who determines the final content of the newspaper" , "Newspaper executive" .)