The phrase "a substantial cut of" is correct and usable in written English.
It can be used when referring to a significant reduction in quantity, size, or amount, often in a financial or resource context.
Example: "The company announced a substantial cut of its workforce to reduce costs."
Alternatives: "a significant reduction of" or "a major decrease in".
Of course, he takes a substantial cut of each buy.
"No other actress could play Katniss Everdeen, and for that reason, she can command a substantial cut of profits".
In doing so, he rekindled a long-simmering debate: do nonprofit theaters deserve a substantial cut of those royalties for producing a new play?
Silvia gives me a lot of time and, even though she gets a substantial cut of yoursafeplanet.com's £45 fee, she's clearly not in it for the money.
To buy and sell them, they are often at the mercy of brokerage firms' trading desks, which sometimes take a substantial cut of the price.
The casino industry in Macau has for decades used what are known as "junket operators" to bring in high rollers from other parts of China who gambled in "VIP rooms" in return for a substantial cut of the take.
She is fed up with the hours and the current pay and is despondent at the prospect of getting a substantial cut to her salary.
Although Google earns no commission from any Android handsets sold, it takes a substantial cut — 30 percent — of the apps sold in the Android Store.
Furthermore, a promise to eliminate rich countries' export subsidies (eventually) and to make a "substantial" cut in other kinds of handouts was vital to reviving the Doha round of global trade talks last summer.
This is like suggesting that a substantial cut in the amount of football played in England would improve the national team.
Mr Flanagan believes a substantial cut in the rate of pay for supply teachers who are engaged for less than 5 days has had a significant impact.
