Stick it to the end, leaving after the others (4,3)
I believe the answer is:
last out
I believe this is a double definition.
'stick it to the end' is the first definition.
'leaving after the others' is the second definition.
(Other definitions for last out that I've seen before include "Survive for as long as is required" , "Keep on going" , "Endure" , "one leaving after everyone else" , "Manage to survive" .)