Reportedly spot fish in vault? (7)
I believe the answer is:
ceiling
'vault?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'reportedly spot fish' is the wordplay.
I cannot really see how this works, but
'reportedly' could be 'e' (I've seen this in other clues) and 'e' is found within the answer.
'fish' could be 'ling' (ling is a kind of fish) and 'ling' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for ceiling that I've seen before include "Overhead surface" , "Room's upper surface" , "likely to get plastered" , "upper limit on wages" .)