Period after sunset (8)
(Other definitions for twilight that I've seen before include "Evening glow" , "Glow after sunset" , "The last rays" , "Condition of decline" , "nightfall" .)
'period after sunset' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dusk that I've seen before include "Time between twilight and night" , "Nightfall" , "The darker stage of twilight" , "Period after sunset" , "Evening light" .)
'period after sunset' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for night that I've seen before include "Time without 10" , "Time for turning" , "Thing (anag)" , "A Hard Day's (the Beatles)" , "death" .)