Choose to cover up one divine murder? (7)

I believe the answer is:

deicide

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'divine murder?' is the definition.
The definition suggests a singular noun which matches the answer.

'choose to cover up one' is the wordplay.
'choose' becomes 'decide' (I've seen this before).
'to cover up' means one lot of letters goes inside another.
'one' becomes 'i' (Roman numeral).
'decide' enclosing 'i' is 'DEICIDE'.

Can you help me to learn more?

(Other definitions for deicide that I've seen before include "Killer" , "dispatch for Mars, say" , "divine crime" , "Most unholy of sins" , "Killing of divine being" .)

I've seen this clue in The Independent.

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