Unsure, not confident (9)
I believe the answer is:
uncertain
I believe this is a double definition.
'unsure' is the first definition.
(I know that unsure can be written as uncertain)
'not confident' is the second definition.
(I've seen this before)
(Other definitions for uncertain that I've seen before include "in the lap of the gods" , "Not at all sure or decided" , "Not convinced" , "Not completely confident or sure of" , "Not definitely known" .)