Related Clues:

• One, for openers
• Prefix on many chemical compound names
• Half of sex-
• TNT component?
• Lateral beginning
• Athlete lead-in
• Plex opener
• One less than quadri-
• Start for "athlete" or "focals"
• Cycle or angle lead-in
• City or state lead-in
• Verse opening
• "Mono" cousin
• Square root of nona-
• Prefix with valent