Bent on a career in crime? (7)
I believe the answer is:
crooked
'bent' is the definition.
(crooking is a kind of bending)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for crooked that I've seen before include "Not straight or aligned" , "Criminal" , "Awry - untrustworthy" , "Bent, twisted" , "Misshapen" .)