Blue hedgehog (5)
I believe the answer is:
sonic
(Other definitions for sonic that I've seen before include "Kind of boom" , "Employing sound" , "Involving sound waves, say a boom" , "Hedgehog" , "of noise" .)
I believe the answer is:
sonic
(Other definitions for sonic that I've seen before include "Kind of boom" , "Employing sound" , "Involving sound waves, say a boom" , "Hedgehog" , "of noise" .)