With a degree, what Bob can be: a superhero! (8)
I believe the answer is:
batwoman
'a superhero' is the definition.
(I have seen 'Female superhero' mean 'batwoman' so perhaps 'superhero' could also mean 'batwoman')
'with a degree what bob can be' is the wordplay.
'with' means one lot of letters go next to another.
'a degree' becomes 'BA' (Bachelor of Arts).
'what bob can be' becomes 'two-man' (as in a two-man bobsleigh).
'ba'+'twoman' is 'BATWOMAN'.
(Other definitions for batwoman that I've seen before include "serving in the forces" , "Female superhero" .)