Canine mum shows blind faith (5)
I believe the answer is:
dogma
'blind faith' is the definition.
(I've seen this before)
'canine mum' is the wordplay.
'canine' becomes 'dog' (dog is a kind of canine).
'mum' becomes 'ma' (ma can mean mother).
'dog'+'ma'='DOGMA'
'shows' acts as a link.
(Other definitions for dogma that I've seen before include "church teaching" , "Set of principles laid down as incontrovertibly true" , "Body of creed" , "Set of beliefs" , "Principles laid down by authority as true" .)