Rascal with pushback in mind (7)
I believe the answer is:
thinker
'mind' is the definition.
(I know that mind can be written as thinker)
'rascal with pushback in' is the wordplay.
I cannot really understand how this works, but
'in' is within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for thinker that I've seen before include "Rodin's ponderer" , "Creative intellectual" , "Subject of Rodin statue" , "Statue carved by 24 across" , "one doing brain operations" .)