Beyond unexpected (5)
I believe the answer is:
eerie
'beyond unexpected' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eerie that I've seen before include "Unnerving" , "Spooky, unearthly" , "Unnatural" , "Spooky, creepy" , "Strange, frightening" .)