My rotating scripy only rotates the part once and stops why?

local Run = game:GetService("RunService")
local cframe = game.Workspace.AvatarEditing.CircleUnderAv.Avatar.PrimaryPart.CFrame -- Current CFrame
	 
	
Run.RenderStepped:Connect(function()
game.Workspace.AvatarEditing.CircleUnderAv.Avatar:SetPrimaryPartCFrame(cframe * CFrame.Angles(0, math.rad(10), 0))
end)

it only rotates it once. How can i make it so it keep rotating the model over and over?

You need to update the cframe variable after every action like this

local Run = game:GetService("RunService")
local cframe = game.Workspace.AvatarEditing.CircleUnderAv.Avatar.PrimaryPart.CFrame	 
	 
Run.RenderStepped:Connect(function()
	game.Workspace.AvatarEditing.CircleUnderAv.Avatar:SetPrimaryPartCFrame(cframe * 		 
        CFrame.Angles(0, math.rad(10), 0))
	cframe = game.Workspace.AvatarEditing.CircleUnderAv.Avatar.PrimaryPart.CFrame
end)

Don't save the PrimaryPart's CFrame as a variable. That will just set it to the CFrame at the time it was indexed.