Crossword Genius

Existing only as an idea (8)

Ross

I believe the answer is:

notional

(Other definitions for notional that I've seen before include "Existing as theory, not existing in reality" , "Imaginary - in on a lot (anag)" , "Like ideas of" , "Assumed to be correct for particular purpose, say estimate" , "Speculative, not based on fact" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.