Rattled (6)
'rattled' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shaken that I've seen before include "Distressed" , "Upset or agitated" , "Agitated or disturbed" , "Shocked or agitated" , "Upset - rattled" .)
(Other definitions for unstrung that I've seen before include "Emotionally distressed" , "(Of pearls or beads) yet to be linked together" .)
(Other definitions for shaken up that I've seen before include "Unnerved" , "Distressed" .)