Possible Clues:

• The underworld might unnerve
• Concern about something unexpected
• Inspectors might for the present get taken aback by this
• To speak contemptuously can cause alarm
• Alarm or consternation
• Over a month, Sidney is frightfully uppish
• 'Alarm, consternation (6)'
• Edible tubers I had turned down in consternation
• Chap overturning could possibly cause this
• Consternate