Easily agitated (7)
I believe the answer is:
nervous
'easily agitated' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nervous that I've seen before include "Stirred" , "'Apprehensive, uneasy (7)'" , "Agitated - excitable" , "Frightened" , "Easily agitated, timid" .)