Crossword Genius

Fabulous slogan for a Geneva journalist? (8)

Ross

I believe the answer is:

imagined

I'm a little stuck... Click here to teach me more about this clue!

'fabulous' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?

'slogan for a geneva journalist?' is the wordplay.
I cannot really understand how this works, but
'a' is within the answer.
'journalist?' could be 'ed' (short for editor) and 'ed' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for imagined that I've seen before include "Created mentally" , "thought" , "Dreamt up" , "Visualised" , "Conjured up in the mind" .)

I've seen this clue in The Times and The Sunday Times.
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