Considered likely to happen or arrive (8)
I believe the answer is:
expected
'considered likely to happen or arrive' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for expected that I've seen before include "Apprehended" , "Considered likely to happen or arrive" , "Thought of as coming" , "Anticipated" , "Considered likely or probable to happen" .)