Possible Clues:

• Perhaps grub to a goose this
• Imaginary cause of fear
• Bogey has to annoy: a shocking word
• Nightmare cause
• Monster
• Harmful creature given a shout of disapproval - object of fear
• Posh talk interrupting work bound briefly to become source of alarm
• Tap phone of sailor getting rings -- it's an alarming thing
• Bogey
• Source of concern