What our case that was lost got left on? (8)
I believe the answer is:
carousel
'case that was lost got left on?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'what our' is the wordplay.
I cannot really understand how this works, but
an anagram of 'our' is 'rou' which is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for carousel that I've seen before include "A closure (anag.)" , "Musical, roundabout" , "fair entertainment?" , "Revolving belt for luggage at airport" , "fairground entertainment" .)