Just saint directed towards good prayers (8)
I believe the answer is:
evensong
'prayers' is the definition.
(I know that Evensong is a prayers)
'just saint directed towards good' is the wordplay.
'just' becomes 'even'.
'saint' becomes 's'.
'directed towards' becomes 'on' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'good' becomes 'g' (abbreviation).
'even'+'s'+'on'+'g'='EVENSONG'
Can you help me to learn more?
(Other definitions for evensong that I've seen before include "Vespers" , "Service of evening prayer in Church of England" , "Anglican service" , "... Prayers" , "Church service late in the day" .)