Related Clues:

• On __: nervous
• Slight lead
• Sharp part of a razor
• Beat, barely
• Lyricist for Broadway’s disastrous “Spider-Man,” with “the”
• Outer boundary
• Sharp border
• Sword side
• Sharp side of a knife
• Jittery people are on it
• Blade's sharp side
• Added boost
• Trim a lawn
• Cutting ___ (most advanced)
• Move little by little to the border