Pushback is a term used to describe resistance or opposition to something. It can be used in a variety of contexts, such as politics, business, and even everyday life. The crossword solution for the term pushback is FLAK, which is an acronym for 'Fliegerabwehrkanone, ' which translates to 'anti-aircraft gun' in German. This term was originally used to describe the defensive fire from anti-aircraft guns during World War II, but has since been adopted to describe any kind of resistance or opposition.