Suspect desperado doing banks, culminating in custody (5)
I believe the answer is:
dodgy
'suspect' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for dodgy that I've seen before include "Not reliable; dangerous" , "Suspect" , "fishy!" , "Risky; dishonest" , "Iffy" .)