Turkish delight was once a familiar term for a familiar candy that originated in Turkey. Its popularity has dropped in the past few decades as children now have an amazing variety of candies in different textures and artificial flavors to choose from. Many people are only familiar with the name from the C.S. Lewis book The Lion, the Witch and the Wardrobe. But there are specialty stores that sell genuine Turkish delight, often with fancy additions like nuts, coconut, or chocolate coatings.
The original Turkish delight is a very sweet and somewhat gummy candy that can sport all manner of flavors. The main ingredients are sugar, cornstarch, water, and flavoring. It's the cooking technique that makes it authentic, and that includes 45 minutes of stirring. So while it may seem like a lot of work, the fresh homemade candy in your favorite flavors will be a worthwhile experiment. Read up on the delights of Turkish delight at Atlas Obscura, and bookmark the included recipe. If you make it, be sure to let us know how it turns out.
Most others that I found have you cook the sugar mixture to 250D or as high as 260D.
You don't need cream of tartar. It's purpose is to prevent the sugar from crystalizing which is what lemon juice or citric acid will do. Adding it to the cornstarch mixture does nothing.
You've got to be careful with the stirring. Too vigorous and the starches break down which prohibit gelling.
Need to read up some more but for now, I'm going with this: https://aegeandelight.com/authentic-turkish-delight-recipe-from-narnia/
Pretty sure it's that one - I've got a lot of open tabs here. . .