What is the "Chili sauce" ingredient in this recipe? I want to make this Copy Cat A1 Steak Sauce but I'm not exactly sure what one ingredient is.

What is it calling for when it says Chili sauce?

Also, if it turns out I don't have the chili sauce they are referring to, are there good substitutions for it?
Heinz and some other companies sell a product that they call 'chili sauce', which might be what you're looking for.

It's a tomato-based sauce, with some spices and seasoning, but it's not particularly spicy.

If you have access to Dutch &amp; German ingredients, you might replace it with one of the thicker shashlik sauces (aka 'curry ketchup').  If you have access to UK ingredients, you might try brown sauce.

If you wanted to make it yourself from scratch, see http://www.food.com/recipe/heinz-chili-sauce-copycat-457947