Deeply distressing (6)
'deeply distressing' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tragic that I've seen before include "Very sad; Schubert's 4th symphony nickname" , "Involving grief of death or destruction" , "Extremely sad; Mahler's 6th nickname" , "Ill-fated" , "Terrible" .)
'deeply distressing' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for traumatic that I've seen before include "Direly shocking" , "Deeply disturbing" , "Deeply distressing" , "Emotionally shocking" , "Psychologically painful" .)