I have to follow a bishop to achieve success (6)
I believe the answer is:
arrive
'achieve success' is the definition.
'i have to follow a bishop' is the wordplay.
'i have' becomes 'ive'.
'to follow' is a charade indicator (letters next to each other).
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'a'+'rr'='arr'
'ive' after 'arr' is 'ARRIVE'.
'to' acts as a link.
(Other definitions for arrive that I've seen before include "Reach destination or desired position" , "Get there" , "Reach a place" , "(Of time) come about" , "Come to a destination" .)