Crossword Genius

Some work around opera company securing hotel before function for conservatory (10)

Ross

I believe the answer is:

greenhouse

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

'conservatory' is the definition.
(thesaurus)

'some work around opera company securing hotel before function' is the wordplay.
I cannot really understand how this works, but
'work' could be 'use' (I've seen this in another clue) and 'use' is located in the answer.
'around' could be 'o' (a round letter) and 'o' is located in the answer.
'hotel' could be 'h' (phonetic alphabet: alpha, bravo, charlie etc.) and 'h' is found within the answer.
The remaining letters 'green' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'for' acts as a link.

Can you help me to learn more?

(Other definitions for greenhouse that I've seen before include "see-through construction" , "somewhere hot" , "Horticulturalists' glass building" , "A place for growing" , "Glass building for rearing plants" .)

I've seen this clue in The Independent.
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