Fantasy (4-7)
'fantasy' is the definition.
(I know that fantasy can be written as illusion)
This is the entire clue.
(Other definitions for illusion that I've seen before include "False impression" , "Fantasy or mirage" , "Deceptive impression" , "can you believe it?" , "Mocking old" .)
'fantasy' is the definition.
(I know that dream is a type of fantasy)
This is all the clue.
(Other definitions for dream that I've seen before include "Reverie or nightmare" , "Somniate" , "Trance" , "Fantasise, imagine" , "Fantasy; ideal" .)
'fantasy' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for make-believe that I've seen before include "Fantasy" , "Pretence" .)