Separatist jerk coming after this place (7)
I believe the answer is:
heretic
'separatist' is the definition.
(thesaurus)
'jerk coming after this place' is the wordplay.
'jerk' becomes 'tic' (I've seen this in other clues).
'coming after' is a charade indicator (letters next to each other).
'this place' becomes 'here' (I've seen this in other clues).
'tic' put after 'here' is 'HERETIC'.
(Other definitions for heretic that I've seen before include "Person with opinions contrary to Church norms" , "Original thinker" , "Non-believer" , "Nonconformist" , "enough for victim of Inquisition?" .)