Related Clues:

• It's really nothing
• Not a whit
• Nary a one
• First-sight phenomenon
• It's nothing, really
• It means nothing to 45-Across
• Avoid getting hit in the ring
• None whatever
• All-conquering thing
• Not even one
• Puppy follower?
• Unimpressive score
• Zero, to Sampras
• Powerful emotion
• Not one