Fanciful visions (6)
I believe the answer is:
dreams
'fanciful visions' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dreams that I've seen before include "Imaginings" , "Thoughts and visions during sleep" , "Reveries or cherished aspirations" , "Fancies" , "'We are such stuff / As dreams are made on' (The Tempest)" .)