Related Clues:

• Keep back
• Fail
• Perform miserably
• Not even get a D
• Fail to pass
• Not pass
• Fail a test
• One usually leads to a repeat
• Get an F
• Require a re-test, perhaps
• Earn an F
• Fail an exam (in the US)
• Do badly
• Fail to get a passing grade
• Fail (exam)