Captors had us kidnapped at twilight (4)
I believe the answer is:
dusk
'twilight' is the definition.
(I know that dusk is a type of twilight)
'captors had us kidnapped' is the wordplay.
'DUSK' is hidden in amongst the letters.
But, I am unsure how the hidden word is indicated.
'at' acts as a link.
Can you help me to learn more?
(Other definitions for dusk that I've seen before include "Eventide" , "Time towards the end of the day" , "Nightfall" , "Time of day after sunset" , "The darker stage of twilight" .)