Quietly ducks going to church with a dog (5)
I believe the answer is:
pooch
'a dog' is the definition.
(pooch is a kind of dog)
'quietly ducks going to church' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'ducks' becomes 'oo' (I've seen this in other clues).
'going to' is a charade indicator (letters next to each other).
'church' becomes 'ch' (common abbreviation).
'p'+'oo'+'ch'='POOCH'
'with' is the link.
(Other definitions for pooch that I've seen before include "one of our best friends" , "Doggy" , "Dog (colloq.)" .)