The phrase "a sort of shadow" is correct and usable in written English.
It can be used to describe something that resembles or has qualities of a shadow, often in a metaphorical sense.
Example: "As the sun set, the trees cast a sort of shadow that danced across the ground."
Alternatives: "a kind of shadow" or "a type of shadow".
Stoppard said to me: 'Jan is a sort of shadow life of my own life.
And the constellation of websites that Albright found – a sort of shadow internet – has another function.
What you see here is the construction of a sort of shadow senior civil service, an alternative source of advice for ministers.
"I like to remember another person behind the scenes, a sort of shadow, and that is my mother," Mr. Conterno said.
Indeed, the bank's largest shareholder, the charitable Monte dei Paschi Foundation, has long operated as a sort of shadow government here.
A stream of lawyers and accountants has joined the NDF to serve as a sort of shadow management team for the utility.
DIC microscope is the most popular one because of the pseudo 3D imaging offered by a sort of shadowing effect.
It's the "HOUSE OF ANUBIS," the centerpiece of a sort of "Dark Shadows" for tweeners that starts its second season Monday at 7 p.m. on Nickelodeon.
He twice ran for office — in 1960, when he was the Democratic Congressional candidate for the 29th District in upstate New York, and in 1982, when he campaigned in California for a seat in the Senate — and though he lost both times, he often conducted himself as a sort of unelected shadow president.
The code for the project is available on GitHub, Another larger goal is to set it up as a distributed network of Wi-Fi locations that can be used as a second sort of shadow Internet where the information is kept private to those who have access.
"If you look at Jeremy Corbyn's own record, his whole career is based on disagreeing with party leaders so I think there is a danger for him in this, in carrying out a reshuffle as a sort of punishment for shadow ministers who've disagreed with him," he added.
