Banker's last to take money out in financial disaster (5)
I believe the answer is:
crash
'disaster' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for crash that I've seen before include "Bang" , "Collide violently" , "Planned quickly for emergency" , "(Of shares) fall suddenly by a great amount" , "failure" .)