Imaginary source of fear (7)
I believe the answer is:
bugaboo
(Other definitions for bugaboo that I've seen before include "it's awful!" , "which makes one anxious" , "Bogey" , "source of alarm" , "Object of anxiety" .)
I believe the answer is:
bugaboo
(Other definitions for bugaboo that I've seen before include "it's awful!" , "which makes one anxious" , "Bogey" , "source of alarm" , "Object of anxiety" .)