Related Clues:
- Doesn't deliver
- Is not up to snuff
- Is all wrong
- Lays an egg
- Does not pass, so loses one's head and is sick of it
- Has to repeat, maybe
- Is insufficient
- See 1
- Doesn't pass
- Tanks, so to speak
- Does not succeed
- Refuse to act and that's just not good enough
- Holds back a grade
- Is unsatisfactory
- Is hardly satisfactory