I stop wallowing in small, timeless sin (8)
I believe the answer is:
iniquity
'sin' is the definition.
(iniquity is wickedness)
'i stop wallowing in small timeless' is the wordplay.
I cannot really understand how this works, but
'i' is within the answer.
'stop' could be 'quit' (synonyms) and 'quit' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for iniquity that I've seen before include "Sin" , "Gross injustice; crime" , "Highly unfair or immoral behaviour" , "Evil act" , "Going wrong" .)