Insecure (6)
I believe the answer is:
unsafe
'insecure' is the definition.
(I know that insecure can be written as unsafe)
This is all the clue.
(Other definitions for unsafe that I've seen before include "Dangerous - legally without basis" , "Perilous" , "Unreliable" , "Hazardous" , "Risky - inadequately evidenced" .)