Aid must change sporting facility (7)
I believe the answer is:
stadium
'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" .)