Anxious, tense (5)
I believe the answer is:
nervy
I believe this is a double definition.
'anxious' is the first definition.
(I've seen this before)
'tense' is the second definition.
(similar in meaning)
(Other definitions for nervy that I've seen before include "Fidgety" , "close to the edge?" , "Excitable" , "Highly-strung" , "Easily agitated, tense" .)