The phrase "primary suggestion" is correct and usable in written English.
It can be used to refer to the main or most important idea or recommendation being presented in a sentence. Here is an example: "Based on my research, the primary suggestion for improving employee satisfaction is implementing a wellness program."
But Apple's primary suggestion is that the bill should be re-written to provide more clarity about the more contested parts of the legislation.
The primary suggestion is to have the president declare our GPS satellites critical infrastructure.
In another, his primary suggestion for initiating physical contact is to tell the girl she has lint on her crotch and then attempt to wipe it off for her.
Their primary suggestion was to arm US missiles with more than one warhead, a concept known as Multiple Re-entry Vehicles (MRV), and ensure they would separate by more than a mile during their flight.
The primary suggestion for the opening of hemichannels came from dye uptake experiments and from the inhibition of dye uptake by hemichannel blockers βGA and MFA.
In addition to more detailed epidemiologic investigations, control and elimination of rabies in dogs is a primary suggestion to test the latter hypothesis.
To properly remove this crust, refer to the Primary Suggestions for healing your piercing.
The primary care suggestion for wounds is to obtain results from microbial analysis before commencing empiric antibiotic therapy.
One of the primary policy suggestions to emerge from a 2009 study of more than 35,000 published in the UK (the most comprehensive of its kind ever conducted there) is that parenting education for school students should become a part of the curriculum.
First, the evidence-base was determined by the primary authors with suggestions from expert panel members.
I am insulted by the suggestion that primary care physicians "typically spend just 10 minutes with diabetic patients".
