Conjured up in the mind (8)
I believe the answer is:
imagined
'conjured up in the mind' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for imagined that I've seen before include "Not based on fact, dubious" , "Supposed" , "Fancied" , "Conjured up in the mind" , "Created in the mind" .)