The phrase "a very inconspicuous" is correct and usable in written English.
It can be used to describe something that is not easily noticed or is subtle in appearance or behavior.
Example: "The spy wore a very inconspicuous outfit to blend in with the crowd."
Alternatives: "quite unnoticeable" or "extremely discreet".
He once said to one, 'We don't want our writers going hungry.' And he'd do it in a very inconspicuous way.
Feel a bit like an ambulance is not a very inconspicuous drug hauling device, considering it's big and yellow and is covered in flashing blue lights and makes and almighty racket.
Presence of these pieces of the conserved meiotic machinery indicates that meiosis is indeed part of the life cycle of O. marina, although probably in a very inconspicuous way.
They're a very loud, very inconspicuous group of idiots who only ever manage to acheive anything through luck.
Here's a relatively inexpensive, yet very inconspicuous magnetic GPS tracker that you can hide on your car to keep tabs on your no-good kids and/or your no-good spouse.
Pamela C. Rasmussen suggested that, given its unusually large eyes, the species might be nocturnal or at least crepuscular, a factor that could make it very inconspicuous, and thus partly explain how it remained undetected for so long.
Sitting beside the patient, between neighbouring machines, we conducted interviews using a very small, inconspicuous digital recorder and a small lapel microphone (see below).
A cooler is a very strong, inconspicuous hard case (some padding inside is appropriate) and protects its contents against impact and external heat for several hours, such as might be present each day in a car trunk.
These are very inconspicuous in daytime, but serve as an effective safety device while driving at night.
"When you lose, you learn to be very inconspicuous," Mr. D'Antoni said at one such dinner, before a game against the Golden State Warriors.
I'm very inconspicuous when I fly.
