Talent of criminal? (4)
I believe the answer is:
bent
This clue is a double definition.
'talent' is the first definition.
(bent is a kind of talent)
'criminal?' is the second definition.
(I've seen this before)
'of' acts as a link.
(Other definitions for bent that I've seen before include "Deformed" , "Dodgy" , "Special skill" , "Dishonest; curved" , "Natural aptitude" .)