The phrase "a sort of hidden" is correct and usable in written English.
It can be used to describe something that is not immediately obvious or is concealed in some way.
Example: "There is a sort of hidden meaning in her words that only a few can understand."
Alternatives: "a kind of concealed" or "a type of obscured".
We climb a steep hill to a sort of hidden entrance deep in the slope.
Toby's comment at that party all those years ago suddenly presents as a sort of hidden teaching moment, a confirmation that this leap I have made is real.
"There was a sort of hidden army of people who were so worried about Labour that they literally came out to vote for the first time".
Mr. Rove pronounced it a good deal -- in part, he said, because there was a sort of "hidden vanity mirror" in a cranny of a bookcase.
"There's been at the same time a sort of hidden but very sharp decline in coverage of government apart from politics, in terms of what government is doing and regulating, and the impact that will have on segments of the economy.
There he became involved in a project to improve the ergonomics of air-traffic-control consoles… Nuovo's California office is a sort of hidden Disneyland for gadget freaks… Phones are everywhere in his studio: in cradles, on desks, on the wall.
But not before she'd told me the salary - US$90,000 for a "P4" (my grade) plus perks, plus more if you've got dependents, which I have - and that a training course was booked for the start of October; five wonderful weeks, presumably playing a sort of hide'n'seek in top-quality combat gear.
The Odyssey School instructor was playing a sort of hide-and-seek game with the students, when he pointed to some and said, "bang, you're dead," Atlanta's Fox 5 reports.
Beyond the aforementioned, the App Switcher has one more neat trick: a sort-of-hidden bonus page with myriad one-click shortcuts.
In his office in parliament he kept a sort of pantry, hidden behind a curtain, stacked with food for the neediest.Along with his piety, though, went ferocity.
But when it shows you performing in New York, you're persevering with dignity at a Ramada Inn lounge, sort of hidden away.
