Crossword Genius

Aid must change sporting facility (7)

Ross

I believe the answer is:

stadium

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

'sporting facility' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?

'aid must change' is the wordplay.
'change' is an anagram indicator.
'aid'+'must'='aidmust'
'aidmust' is an anagram of 'STADIUM'.

Can you help me to learn more?

(Other definitions for stadium that I've seen before include "Sports ground as for athletics" , "Sports arena" , "bowl?" , "Venue for sporting events, concerts etc" , "A major sports ground" .)

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