What God did, or a member of the Cosa Nostra? (4,3)

'what god' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'did or a member of the cosa nostra?' is the wordplay.
I cannot really understand how this works, but
'did' could be 'made' (making is a kind of doing) and 'made' is present in the answer.
'a' could be 'an' and 'an' is located in the answer.
'member' could be 'm' and 'm' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?