Maybe Robin and American withdrawing a sub for The New Yorker (9)

I believe the answer is:
superhero
'the new yorker' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'maybe robin and american withdrawing a sub' is the wordplay.
'maybe robin' becomes 'per' (I can't explain this - if you can you should believe this answer much more).
'and' is a charade indicator (letters next to each other).
'american' becomes 'US' (United States).
'withdrawing' is a reversal indicator.
'a sub' becomes 'hero' (synonyms).
'us' back-to-front is 'su'.
'per' after 'su' is 'super'.
'super'+'hero'='SUPERHERO'
'for' is the link.
Can you help me to learn more?
(Other definitions for superhero that I've seen before include "Fictional character with strange powers" , "comic book creation" , "Spiderman, for example" , "Batman, say?" , "I'm often seen in a cape" .)
