The phrase "a fanciful one" is correct and usable in written English.
It can be used to describe something that is imaginative, whimsical, or not grounded in reality, often referring to ideas, stories, or concepts.
Example: "The author's latest novel is a fanciful one, filled with magical creatures and enchanting landscapes."
Alternatives: "an imaginative one" or "a whimsical one."
This has been something of a theme, albeit a fanciful one.
Similarly, although Klopp laughed the suggestion out of court, the idea of Liverpool entering the title race is not such a fanciful one.
The notion of online or mobile voting isn't a fanciful one: In March this year, the Republican Party of Utah ran an online voting trial that its chairman, James Evans, hailed "a tremendous success".
She toiled away on this project until her mother reprimanded her for neglecting her studies, which were meant to set her on a rational course, not a fanciful one.
Is this scenario (or something resembling it) a fanciful one?
But in Britain, at least, the prospect of a nationwide conflict between Muslims and non-Muslims now seems like a fanciful one.
If one were fanciful, one might say that the ghosts of the old Madison Square Garden walkers moved him — or, more bluntly, that the same cult of ambition and success that made Weston turn a small bar bet into a life's career infects the dreams of the young writer.
New Year's resolutions are a habit in some places, so why not a few fanciful ones?
Critics have labelled The Alternative a joke and attacked its policies for being unsubstantiated and fanciful – one of its members floated the idea of solar-powered cycling pipelines that would generate tailwind – but the party has struck a rich vein among disillusioned voters who find the old parties closely aligned on core issues and lacking ambition.
Tucked away behind an unmarked door in Manhattan's NoHo neighborhood, the jeweler Mish Tworkowski's chic new salon and studio is the perfect backdrop for his fanciful, one-of-a-kind designs.
There is a terra-cotta pot like the one's that adorned Cosimo de' Medici's Renaissance garden in Florence, and one with a fanciful face on the side that was developed during the era of the great tulip craze in the Netherlands.
