Crossword Genius

Animal with flower returning another flower for La Scala? (5,5)

Ross

I believe the answer is:

opera house

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

'animal' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'flower returning another flower for la scala?' is the wordplay.
I cannot quite understand how this works, but
'flower' could be 'ouse' (Yorkshire river) and 'ouse' is present in the answer.
'another' could be 'r' (I've seen this in other clues) and 'r' is found within the answer.
This explanation may well be incorrect...

'with' acts as a link.

Can you help me to learn more?

(Other definitions for opera house that I've seen before include "where one hears bass?" , "Sydney's place?" .)

I've seen this clue in The Independent.
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