Feature of power invested in a religious group (6)
I believe the answer is:
aspect
'feature' is the definition.
(aspect is a kind of feature)
'power invested in a religious group' is the wordplay.
'power' becomes 'p'.
'invested in' indicates putting letters inside.
'religious group' becomes 'sect' (I've seen this before).
'a'+'sect'='asect'
'p' put within 'asect' is 'ASPECT'.
'of' is the link.
(Other definitions for aspect that I've seen before include "Visual effect" , "'Scene, view, vista (6)'" , "Distinct part or element" , "Angle" , "View, outlook" .)