No speakout, it is not the parents responsibility to deck out their child in designer clothing.
I pay for my DC and they are happy to walk around in Primarnis finest. They save for converse and branded make up.
I think sitting down with a budget is a good idea.
Also if she stops going to college won't that increase your expenses, for example do you get council tax discount, would that be removed if she stopped going to college?
I think offer her alternatives, including if she then chooses to give up college, and watch her friends excel and go on to uni, better paid jobs etc whilst she's still at home.
Also divvy up chores for her, kids need to take care of themselves and learn the basics of running a household, get her to help budget for groceries and let her see how much your paying all bills.
Maybe if you stop dancing attnedance to her she will realise the value in cooking and cleaning and taking care of herself insteado f having you race aroudn after her whilst she feels increasingly entitled.