Sad time with such as Hamlet making a comeback (6)
I believe the answer is:
tragic
'sad' is the definition.
(similar in meaning)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tragic that I've seen before include "Terrible" , "Exceedingly sad" , "Causing extreme distress or sorrow" , "Calamitous, causing great sadness" , "Resulting in great loss" .)