7-Eleven and Circle K, informally

CSTORES

Think of where you might grab a Slurpee or a quick coffee—these spots are often open late and stocked with snacks. The term is a short way to say their business type.

This clue refers to "7-Eleven and Circle K" as common examples of convenience stores, which are often called "C-stores" in everyday language. The "informally" hint signals that the answer is a shortened or slang term rather than the full name. "CSTORES" is simply a compact way to say "convenience stores," dropping the vowels for brevity, like many informal abbreviations.