How do I change this script from an onTouched function to an onClicked function?

Hello!

For context:

Previously, players in my game had to approach the 'giver part' to give their player an "accessory" (part with a mesh inserted into the player's character, i.e "Top Hat"). This worked fine until recently, when it was discovered that it was easier to have the 'giving part' clickable. This is where I'm having trouble, since I don't know how to correctly modify the script so that I can update the function...

Here's the script:

local debounce = true

function onTouched(hit)
	local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
	if plr then
	if (hit.Parent:findFirstChild("Humanoid") ~= nil and debounce == true) then
		debounce = false
local	h = Instance.new("Hat")
local	p = Instance.new("Part")
		h.Name = "Top Hat"
		p.Parent = h
		p.Position = hit.Parent:findFirstChild("Head").Position
		p.Name = "Handle" 
		p.formFactor = 0
		p.Size = Vector3.new(2, 1, 1) 
		p.BottomSurface = 0 
		p.TopSurface = 0 
		p.Locked = true 
		script.Parent.Mesh:clone().Parent = p
		h.Parent = hit.Parent
		h.AttachmentPos = Vector3.new(0, 0, 0)
		wait(5)
		debounce = true
	else
		end
	end
end
script.Parent.Touched:connect(onTouched)

Any help is appreciated, thank you. :)

First, create a ClickDetector inside the Part (if you already did you can proceed to next step).

Second, use the ClickDetector.MouseClick which fires when a Player clicks on the Part.

Third, modify the Script.

local Players = game:GetService("Players")
local part = script.Parent
local clickDetector = part.ClickDetector
local debounce = true

local function onClicked(player)
	if debounce == true then
		debounce = false
		
		local character = player.Character
		local humanoid = character:FindFirstChildOfClass("Humanoid")
		local head = character.Head
		
		local mesh = part.Mesh
		local meshClone = mesh:Clone()
		
		local hat = Instance.new("Accessory")
		hat.Name = "Top Hat"
		hat.AttachmentPos = Vector3.new(0, 0, 0)
		
		local handle = Instance.new("Part", hat)
		handle.Name = "Handle"
		handle.Size = Vector3.new(2, 1, 1)
		handle.Material = Enum.Material.SmoothPlastic
		handle.Locked = true 
        	meshClone.Parent = handle
		handle.Position = head.Position
		
		humanoid:AddAccessory(hat) -- makes the player wear the hat
		task.wait(5)
		debounce = true
	end
end

part.Touched:Connect(function(hit)
	local player = Players:GetPlayerFromCharacter(hit:FindFirstAncestorOfClass("Model"))
	if player ~= nil then -- if player exists (not nil/nonexistent)
		onClicked(player)
	end
end)

clickDetector.MouseClick:Connect(onClicked)

And that's it! It should work now! :D