Feel he may be guilty (7)
I believe the answer is:
suspect
'feel' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for suspect that I've seen before include "Imagine guilt" , "man distrusted?" , "Have qualms about" , "Have reason to believe" , "Believe (someone) guilty" .)