Make a slurry by thoroughly combining flour and lukewarm water in a small bowl and mix until smooth.
Add turkey stock to large saucepan and bring to a simmer.
Gradually whisk in the slurry. Then cook on medium heat until slurry is incorporated and gravy has thickened, about 7-8 minutes. Be sure to stir occasionally.
Slowly whisk in the white wine and cook on medium heat for about 6 more minutes, or until it is the consistency you desire, add salt and pepper to taste and serve warm.