Very sad (6)
'very sad' is the definition.
(tragic can mean very sad or unfortunate)
This is the entire clue.
(Other definitions for tragic that I've seen before include "Dreadful" , "Terrible" , "Disastrous, pitiful" , "Shocking" , "Very sad; Schubert's 4th symphony nickname" .)
(Other definitions for morose that I've seen before include "blue" , "Rarely" , "Lugubrious" , "dark" , "Peevish and gloomy" .)