View quietly adopted by a religious group (6)
I believe the answer is:
aspect
'view' is the definition.
('aspect' can be a synonym of 'view')
'quietly adopted by a religious group' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'adopted by' indicates putting letters inside (I've seen this in other clues).
'religious group' becomes 'sect' (I've seen this before).
'a'+'sect'='asect'
'p' placed within 'asect' is 'ASPECT'.
(Other definitions for aspect that I've seen before include "particular view" , "Scene, look" , "Particular or distinct element, of a problem say" , "Feature; appearance" , "front" .)