Regular departures from Kennedy terminal (3)
I believe the answer is:
end
'terminal' is the definition.
(I've seen this in other clues)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for end that I've seen before include "Butt" , "Extremity" , "Time to break-up (3,2,4) - See 12" , "Termination" , "Aim - point - finish" .)