The phrase "a sort of acting" is correct and usable in written English.
It can be used to describe a type or manner of acting that is not fully defined or is somewhat ambiguous.
Example: "Her performance was captivating, but it felt like a sort of acting that blurred the lines between reality and fiction."
Alternatives: "a kind of acting" or "a type of acting".
Then my parents sent me to what was called "elocution" – in fact, a sort of acting – and I discovered that I didn't have to be this weedy little person.
Titles like Horrors of the Black Museum (1959), Dr Terror's House of Horrors (1965) and Konga (1960), a cut-price rival to King Kong, did Gough no favours artistically, but were there when he needed the money and fitted in with his own view of himself as a sort of acting tradesman who took on jobs as they came along, if they appealed, and just got on with it.
The freedom of the intellect from the service to the individual will constitutes a sort of acting 'out of character'.
He studied all sorts of acting techniques, from method acting in New York to the "really French acting classes where they only talk about pronunciation".
Mr. Hartke's changes of meter and tempo are a sort of method acting.
Till that moment, she'd been operating in a sort of fog, acting on the hazy excited intuition of what felt good and of the merciful absence of her mind.
Rather, this sort of acting out may be a symptom of a problematic relationship.
"It was that sort of adrenaline rush sort of acting that I'd missed for a long time," she said.
"The three of us who have been awarded the prize are sort of acting on behalf of the whole field," he told a news conference in Cambridge, England.
What she sees through the window is a sort of movie the window acting as a cinema screen, a frame within the frame which prepares her for the new sort of movie she is about to step into.
In a sort of preparation method acting, the shocking truths she learned were impossible not to internalize.
