Name of knight returning after church (5)
I believe the answer is:
chris
'name' is the definition.
'knight returning after church' is the wordplay.
'knight' becomes 'sir' (a knight has the title Sir).
'returning' says the letters should be written in reverse.
'after' is a charade indicator (letters next to each other).
'church' becomes 'ch' (abbreviation on maps etc).
'sir' reversed gives 'ris'.
'ris' put after 'ch' is 'CHRIS'.
'of' acts as a link.
(Other definitions for chris that I've seen before include "Diminutive male or female name" , "-- Martin, Coldplay lead singer" , "-- Bonington, British mountaineer" .)