like "Romeo and Juliet" (6)
I believe the answer is:
tragic
'like romeo and juliet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tragic that I've seen before include "Disastrous, appalling" , "Greatly distressing" , "Resulting in great loss" , "Disastrous, desperately sad" , "like King Lear" .)