This writer's restricted by following yesteryear's bishop (7)
I believe the answer is:
latimer
'yesteryear's bishop' is the definition.
(Hugh Latimer, 16th-century bishop)
'this writer's restricted by following' is the wordplay.
'this writer's' becomes 'I'm' (the person writing the crossword clues).
'restricted by' means one lot of letters goes inside another (I've seen this in other clues).
'following' becomes 'later' (I've seen this before).
'im' inserted inside 'later' is 'LATIMER'.
(Other definitions for latimer that I've seen before include "One of the Oxford Martyrs" , "The church burned this bishop" , "Bishop condemned" , "Martyred reformer - village on the Metropolitan Line" , "One burnt with Ridley at Oxford" .)