Momentous (8)
'momentous' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for historic that I've seen before include "Connecting with old times" , "sort of present" , "Pertaining to what is important in the past" , "Significant" , "Of significance in the past" .)
'momentous' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eventful that I've seen before include "Full of noteworthy incidents" , "Memorable; momentous" , "Consequential" , "Action-packed" , "Packed with incident, lively" .)
'momentous' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for important that I've seen before include "It's vital" , "major" , "Significant, valuable" , "Meaningful" , "Noteworthy, significant" .)