Cleric gets sanction by journalist overturned (7)
I believe the answer is:
revoked
'overturned' is the definition.
('revoke' can be a synonym of 'overturn')
'cleric gets sanction by journalist' is the wordplay.
'cleric' becomes 'rev' (abbreviation for Reverend).
'gets' means one lot of letters go next to another.
'sanction' becomes 'ok' (to OK something is to approve or sanction it).
'by' says to put letters next to each other.
'journalist' becomes 'ed' (short for editor).
'rev'+'ok'+'ed'='REVOKED'
(Other definitions for revoked that I've seen before include "Officially cancelled" , "Failed to follow suit" , "Cancelled - played illegal card" , "Rescinded" .)