>>13560463
Buy a whole chicken, remove the breasts, wings and legs and use the carcass to make a stock.
Add 2 parts celery, 1 part carrots, 1 part onion. (You don't have to follow that religiously but that is a typical ratio called a mirepoix). You can throw in some fresh parsley to, stalks and all.
Give it about 45 mins and be sure to skim the scum that initially comes to the surface as it starts to simmer.