Imaginary perfect place (6)
I believe the answer is:
utopia
'imaginary perfect place' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for utopia that I've seen before include "Perfect state of things" , "Imaginary place where everything is perfect" , "Place of perfect happiness" , "Impracticable state of perfection" , "Sir Thomas More's perfect country" .)