Imagined (6)
'imagined' is the definition.
(dream up can mean to imagine)
This is all the clue.
(Other definitions for dreamt that I've seen before include "Had mind pictures while asleep" , "Vainly hoped" , "wasn't practical?" , "Fantasised" , "Imagined" .)
'imagined' is the definition.
('suppose' can be a synonym of 'imagine')
This is the entire clue.
(Other definitions for supposed that I've seen before include "So-called" , "Putative" , "Generally believed" , "Imagined; assumed" , "Assumed - hypothetical" .)
'imagined' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for illusory that I've seen before include "Deceptive" , "Fanciful, imaginary (8)" , "Not real, imagined" , "Unreal, fanciful" , "dreamed up" .)
'imagined' is the definition.
(picturing is a kind of imagining)
This is all the clue.
(Another definition for pictured that I've seen is " Imagined".)