Encouraging noises from cat after Schrödinger's opening (8)

I believe the answer is:

spurring

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

'encouraging' is the definition.
(spurring is a kind of encouraging)

'noises from cat after schrodinger's opening' is the wordplay.
I cannot quite understand how this works, but
'from' could be 'in' (I've seen this in other clues) and 'in' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

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

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