Not real, deceptive (8)
I believe the answer is:
illusory
I believe this clue is a double definition.
'not real' is the first definition.
(I've seen this before)
'deceptive' is the second definition.
(I've seen this before)
(Other definitions for illusory that I've seen before include "in the imagination" , "Unreal, fanciful" , "dreamed up" , "Not real, imagined" , "Deceptive" .)