The phrase "a cloud made of" is correct and usable in written English.
It can be used when describing the composition or material of a cloud, often in a metaphorical or imaginative context.
Example: "In the story, the protagonist found themselves in a dreamlike landscape where they floated on a cloud made of cotton candy."
Alternatives: "a cloud composed of" or "a cloud consisting of".
Overhead dangled a cloud made of Ping-Pong balls.
We had to kill someone, I believe, when the metal bones burned and the top fell through the bottom and a cloud made of dust and memos and skin muscled across Manhattan.
In a second step, the A-particles cross a cloud made of dispersed B-grains, which come and stick on the particle surfaces (Ravey, 1975), producing B-coating theough the Ballistic Particle-Cluster process (BaPCA) (Meakin, 1985).
She's whiter than a cloud made of blow.
He foresaw climate change in The Storm-Cloud of the Nineteenth Century – both as a physical threat, in industrial pollution, and a metaphysical one, as a "plague cloud made of dead men's' souls".
The 32-year-old looked stunning in a fluffy, feathery concoction from Valentino Couture that made it appear like she was gliding on a pink cloud (made of Muppets, naturally).
If you're a consumer of fear-mongering news stories like I am, the 2016 Olympic Games in Brazil seem to have a cloud hanging over them a cloud made of mosquitoes carrying the Zika virus.
Founded in the 18th century but only recently swallowed up by the mammoth Swatch Group, Breguet conjured up a slender oval case ringed with diamonds featuring a day-night indicator with clouds made of mother of pearl and a moon crafted from titanium.
Draw a half circle and some clouds made of several circles.
She gives a different line and texture to every element in a drawing: rocks may be striated, clouds made of dots, trees silhouetted, streams formed like undulating ribbons.
Across the room, the tale of Little Red Riding Hood was unfolding with hand puppets pieced together from recyclables, against a bright blue backdrop that had clouds made of chunks of cotton.
