Suffer a bad defeat; fall heavily (4,1,7)
I believe the answer is:
come a cropper
(Other definitions for come a cropper that I've seen before include "Suffer a defeat" , "Fall heavily and unexpectedly" , "Fail badly" , "Fail spectacularly" .)
I believe the answer is:
come a cropper
(Other definitions for come a cropper that I've seen before include "Suffer a defeat" , "Fall heavily and unexpectedly" , "Fail badly" , "Fail spectacularly" .)