Crossword Genius

... all-father in German operas (3,4)

Ross

I believe the answer is:

the ring

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

'operas' is the definition.
(The Ring, cycle of operas by Richard Wagner)

'all-father in german' is the wordplay.
I cannot quite see how this works, but
'in' is present in the answer.
'german' could be 'g' (abbreviation) and 'g' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Telegraph.
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