Risk everything (2,3,5)
I believe the answer is:
go for broke
'risk everything' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for go for broke that I've seen before include "Make all-or-nothing effort" , "Gamble everything" , "Risk everything in an all-out effort" , "Make an all-out effort" .)