I agree that it depends on your definition of "clean."
I'd like to hear your goals (I'm guessing they're related to muscle gain based on your leanness/size in the avi and question).
In general though: I don't think it's a good idea to count SHIT towards your macro totals. If you're talking about grabbing some sandwiches, pasta, burgerz, meats that are a bit heavy on the sauces, etc on campus for convenience, I don't think it will be a huge problem (assuming that you're bulking up). Eating a little dirty when bulking isn't the worst thing in the world, but I don't think that it's a good idea to rely on the really crappy stuff like desserts, potato chips, microwave snacks, fried stuff that is more batter than meat/potato- you know, the real garbage that doesn't even remotely resemble the ingredients it's made from. Not saying you can't have a little fun with the eating when you're bulking. I'd just want to make sure I'm fueling my muscles with good nutrients so that they'll actually grow. So IMHO the "fun" eating should be on top of a solid base of at least semi-clean food.
Also, regarding the "6 meals a day" thing. If getting in EXACTLY six meals each day is a real pain in the ass on some days based on the schedule, you should be fine with less. I think it's more important to worry about what you're eating ON THE DAY rather than what you're eating at 6 specific times. If you only get 4-5 meals in on a given day due to a shit schedule, just make sure you eat enough at the meals you do get in. Assuming you get in enough cals/macros on a given day, you shouldn't be sabotaging your gains by splitting those nutrients between a few meals rather than a full 6.
Hope that helps. Can make more specific recommendations if you give more specific background/goal info.