Hesitant, diffident (9)
I believe the answer is:
tentative
I believe this is a double definition.
'hesitant' is the first definition.
(I've seen this before)
'diffident' is the second definition.
(I've seen this before)
(Other definitions for tentative that I've seen before include "Hesitant; provisional" , "Exploratory - hesitant" , "To be confirmed" , "Hesitant, cautious" , "Not sure" .)