Related Clues:

• Mark on a ruler
• Sharp part of a razor
• Beat, barely
• Lyricist for Broadway’s disastrous “Spider-Man,” with “the”
• Outer boundary
• Tiptoe or creep
• Sharp border
• Sword side
• Move slowly (forward)
• Sharp side of a knife
• Jittery people are on it
• Blade's sharp side
• Added boost
• Go like a snail
• Trim a lawn