Process of immersion washes away sin and record of one's deeds (6)

I believe the answer is:

memoir

I'm a little stuck... Click here to teach me more about this clue!

'record of one's deeds' is the definition.
'memoir' can be an answer for 'record' (memoir is a kind of record). I am not certain of the 'of one's deeds' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for memoir that I've seen before include "A written account of personal events" , "Biographical account" , "Written account of events one has lived through" , "Personal life story" , "Written record of personal experiences" .)

I've seen this clue in the Sydney Morning Herald.

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