Possible Clues:

• On cello (anag.)
• Last Cluedo room's empty? No suspect
• No cello for this officer
• ___ Les Claypool's Fearless Flying Frog Brigade
• Officer from company leading unit between lines
• Bogey perhaps requiring paired points on railway
• "Full bird" military rank
• Sanders or Mustard
• Highest rank in the Swiss Guard
• Military type: leading the Spanish