Go kaput (3)
I believe the answer is:
die
'go kaput' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for die that I've seen before include "Engraved device that stamps design on coins" , "Pass from physical life" , "THIRD PART OF 24" , "Pass away" , "Depart with engraved stamp" .)