Alabama gun scare (5)
I believe the answer is:
alarm
'scare' is the definition.
(alarming is a kind of scaring)
'alabama gun' is the wordplay.
'alabama' becomes 'al'.
'gun' becomes 'arm' (I've seen this in other clues).
'al'+'arm'='ALARM'
(Other definitions for alarm that I've seen before include "Frighten, warning" , "Burglar deterrent" , "Feeling of fear" , "State of (sudden) fear" , "Arouse to a sense of danger" .)