At end of day, prayers still no good (8)
I believe the answer is:
evensong
'at end of day prayers' is the definition.
I can't tell whether this definition defines the answer.
'still no good' is the wordplay.
'still' becomes 'even so' (both can mean 'nonetheless').
'no good' becomes 'ng' (abbreviation).
'evenso'+'ng'='EVENSONG'
Can you help me to learn more?
(Other definitions for evensong that I've seen before include "6 [SERVICE] ?" , "Anglican service" , "... Prayers" , "Late afternoon church service" , "Vespers" .)