Anxious, afraid (8)
I believe the answer is:
insecure
This clue is a double definition.
'anxious' is the first definition.
(similar in meaning)
'afraid' is the second definition.
(similar in meaning)
(Other definitions for insecure that I've seen before include "Sinecure arranged for the nervous" , "Anxious - feeling unsupported" , "safe? Hardly" , "Not safe or confident in oneself" , "Vulnerable" .)