Some dismal sins recalled in religion (5)
I believe the answer is:
islam
'religion' is the definition.
(Islam is an example)
'some dismal sins recalled' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'recalled' says the letters should be written backwards.
'malsi' is hidden within 'dismal sins'.
'malsi' written backwards gives 'ISLAM'.
'in' acts as a link.
(Other definitions for islam that I've seen before include "Religion based on Muhammad's teachings" , "Monotheistic religion" , "organised religion" , "Mohammed's religion" , "Religion of the Koran" .)