The phrase "a primary attraction" is correct and usable in written English.
It can be used to describe the main or most significant appeal of something, such as a place, event, or concept.
Example: "The museum's interactive exhibits serve as a primary attraction for families visiting the city."
Alternatives: "main draw" or "key appeal".
The ability to provide data on public opinion in real time is a primary attraction of sentiment analysis.
Before these championships began, Miller, 25, was already a primary attraction in Europe, because of his flair on the slopes and his candor off them.
Even though a primary attraction of ultrarunning is to test limits, it is not always so easy to recognize the line between mere suffering and crossing a dangerous threshold, runners and race organizers said.
The credit union has sponsored sports teams at the University of Washington in recent years, and has installed A.T.M. machines on campus and opened branches nearby, a primary attraction being that undergraduates are relatively unencumbered.
Eating out in Portland is a primary attraction for out-of-town visitors.
Lure of lucre is, no doubt, a primary attraction of life.
The positively charged residues (i.e., lysine and arginine) were the primary source of peptide-GAG attraction, and replacing the positively charged residues in the HA binding peptide with neutral glycine residues (i.e., the charge control peptide) largely eliminated peptide-GAG attraction.
Mr. Mendelsohn's ability to evoke a child's-eye view of a suburban environment is the most seductive element in a movie whose primary attraction is an atmosphere so heady that you can almost taste it.
Back in the 30s, Gustave was the hotel's primary attraction, a vision of purple-clad slickness attending the guests with oily efficiency, bedding the dowagers whose patronage was his fetish.
It must he hard to headline a festival knowing that the primary attraction lies beneath you on the bill.
The aircraft carrier is the primary attraction of a struggling, high-end sport diving industry.
