Fellow takes church position (6)
I believe the answer is:
stance
'position' is the definition.
(I know that stance is a type of position)
'fellow takes church' is the wordplay.
'fellow' becomes 'stan' (man's name).
'takes' is a charade indicator (letters next to each other).
'church' becomes 'CE' (abbreviation for Church of England).
'stan'+'ce'='STANCE'
(Other definitions for stance that I've seen before include "Posture - attitude" , "Upright posture" , "Attitude (of body, mind)" , "Pose, for a golfer say" , "driver preparing to strike" .)