Suspicious at Iron Man going in with bad guy (4-4)
I believe the answer is:
anti-hero
'bad guy' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
'suspicious at iron man going in' is the wordplay.
'suspicious' indicates anagramming the letters (an unusual or suspect spelling).
'man' becomes 'he' (pronoun for a man).
'going in' indicates putting letters inside.
'at'+'iron'='atiron'
'atiron' with letters rearranged gives 'antiro'.
'antiro' going around 'he' is 'ANTI-HERO'.
'with' is the link.
Can you help me to learn more?
(Other definitions for anti-hero that I've seen before include "Central character lacking traditional courageous attributes" , "Weak central character of a book or drama" , "Unlovable main character" , "Ignoble central character (of book, etc)" , "Main character in play that lacks noble qualities" .)