"original suggestion" is a correct and usable phrase in written English.
You can use it when referring to a specific suggestion that someone put forward. For example, "We eventually decided to go with my original suggestion to have the meeting on Tuesday."
I followed his original suggestion.
Camus started "L'Étranger" with "Maman died today", not "Maman died yesterday" which was our original suggestion.
This appeased David Einhorn, who heads Greenlight Capital, even though it fell short of his even bolder original suggestion.
2) You were our original contact at Paristay, you made the original suggestion of the Bailleul apartment, and we made our original arrangements through you.
The original suggestion of wrongdoing was first raised in a book underwritten by an organization headed by Stephen K. Bannon, a key adviser to Trump.
Like other improv groups, using suggestions from the audience Harold groups weave loose but lengthy story lines around that theme, eventually circling back to the original suggestion.
Mr. Dean, who had worked with Mr. Rehnquist and admired him, made the original suggestion for a choice that was far from obvious.
The customer who came up with the original suggestion about hanging the signed photographs was a Yankees infielder named Billy Martin.
He made an original suggestion: "When I got to New York today, I noticed how restaurants post letter grades from the Health Department.
To expand the appeal of "Gasoline Alley" beyond auto enthusiasts, Patterson put forth a not wholly original suggestion: Why not add a cute baby?
It also indicates what types of suggestions the organization values, even clarifying what is appropriate for others who did not make the original suggestion.
