Not confident (8)
'not confident' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for uncertain that I've seen before include "in the lap of the gods" , "Not definite" , "Doubtful, indecisive" , "Not at all sure or decided" , "Lacking confidence" .)
'not confident' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for insecure that I've seen before include "Dangerous" , "Sinecure for those lacking in confidence" , "Lacking self-confidence or assurance" , "Anxious - feeling unsupported" , "Wavering" .)