Nervous, fearful (5)
I believe the answer is:
timid
I believe this is a double definition.
'nervous' is the first definition.
(I've seen this before)
'fearful' is the second definition.
(similar in meaning)
(Other definitions for timid that I've seen before include "Nervous and easily alarmed" , "Easily frightened" , "Shrinking" , "Easily alarmed, shy" , "Pusillanimous" .)