The phrase "a cluster of six" is correct and usable in written English.
It can be used to describe a group or collection of six items or entities that are closely related or positioned together.
Example: "In the garden, there was a cluster of six vibrant roses blooming together."
Alternatives: "a group of six" or "a set of six".
By then each bulb will have turned into a cluster of six or more.
In August 1999, San Francisco officials traced a cluster of six syphilis cases back to the AOL chat room.
After their separation, a cluster of six satellites was created, revolving around the Earth initially in very close orbits.
A cluster of six men gathered at a friend's house, beneath Selma's water tower proclaiming "Selma, a great place to live".
The city is currently reviewing proposals for the third development zone, a cluster of six- to seven-story apartment buildings at the southern end of the boardwalk.
It's in Islamorada, a cluster of six islands in the Upper Florida Keys, known as the sport fishing capital of the world.
A cluster of six cases in the football program at Sherwood High School in Sandy Spring at the start of the academic year was the notable exception.
In Storm King's North Woods area, "Architectural Cactus Grove, #1-6," from 2008, is a cluster of six whimsical sculptures that seem to be frolicking in a clearing.
Four years later, he became one of the first residents of the newly opened Gateway Plaza, a cluster of six apartment buildings containing 1,700 apartments that was Battery Park City's first residential complex.
In order for that matchup to occur, the Knicks first have to regroup, then outlast a cluster of six teams vying within two and a half games of one another for the Eastern Conference's final playoff berth.
maculatus), in which fertilization and hatching of eggs occur within the maternal body (ovoviviparity), contains a cluster of six c6ast genes (Fig. 4a), with potential hatching enzyme-like activity30.
