Following gospel for bit of luck (5)
I believe the answer is:
fluke
'luck' is the definition.
(I know that fluke is a type of luck)
'following gospel for bit of' is the wordplay.
'following' means one lot of letters go next to another.
'gospel' becomes 'Luke' (book of the New Testament).
'bit of' indicates taking the first letters.
The first letter of 'for' is 'f'.
'luke' after 'f' is 'FLUKE'.
(Other definitions for fluke that I've seen before include "Unlikely stroke of luck" , "Accidental success" , "Barb on anchor - chance success" , "One lucky" , "Fortuitously secure" .)