Related Clues:

• The first cardinal
• Not even one
• It precedes ''Blastoff!''
• Horrible grade on a test
• With 15-Down, low
• Champion's number
• Kind of tolerance
• Next to nothing?
• -
• Nadir
• With 60-Down, eventually
• Common lunchtime
• It's better than none
• Cellular ___
• Unrealistic potato chip serving