Reading there's a new Superman (7)
I believe the answer is:
perusal
'reading' is the definition.
(I know that perusal is a type of reading)
'a new superman' is the wordplay.
I cannot really see how this works, but
'a' could be 'per' (eg 'one a day' means 'one per day') and 'per' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'there's' acts as a link.
Can you help me to learn more?
(Other definitions for perusal that I've seen before include "Process of examination" , "Reading, examination" , "Thorough read-through" , "Careful examination" , "Inspection" .)