Doubt religious group would get us quiet (7)
I believe the answer is:
suspect
'doubt religious group' is the definition.
'suspect' can be an answer for 'doubt' (synonyms). I'm not certain of the 'religious group' bit.
'would get us quiet' is the wordplay.
'would' becomes 'sect' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'get' indicates putting letters inside.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'us'+'p'='usp'
'sect' enclosing 'usp' is 'SUSPECT'.
Can you help me to learn more?
(Other definitions for suspect that I've seen before include "Imagine to be guilty" , "Doubt truth of" , "Person being accused" , "Believe to be guilty, but without proof" , "Have qualms about" .)