Fail to keep one's cool (5)
I believe the answer is:
panic
(Other definitions for panic that I've seen before include "Widespread fear" , "Sudden overpowering fear" , "Frantic fear" , "Have kittens" , "Overwhelming feeling of fear and anxiety" .)
I believe the answer is:
panic
(Other definitions for panic that I've seen before include "Widespread fear" , "Sudden overpowering fear" , "Frantic fear" , "Have kittens" , "Overwhelming feeling of fear and anxiety" .)