Still to come or already gone? (4)
I believe the answer is:
late
'still' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for late that I've seen before include "Not yet arrived - departed" , "Tardy, slow" , "near the end" , "Far on in the day" , "Unpunctual or dead (4)" .)