
1) Bombs 2) Bombs miserably 3) Breaks down 4) Comes a cropper 5) Comes up short 6) Defaults 7) Does not pass 8) Gets a bad grade 9) Gets an F 10) Gets an F for effort 11) Goes belly up 12) Goes belly-up 13) Goes bust 14) Goes kaput 15) Goes on the fritz 16) Goes to the wall 17) Goes under 18) Has to repeat
Found on
https://www.crosswordclues.com/clue/fails

1) Comestogrief 2) Misfires
Found on
https://www.crosswordclues.com/clue/fails
No exact match found.