The term ACT HEROIC can be broken down into three crossword solutions: GEST, EPIC, and EPOS. GEST is a noun meaning an act or gesture, especially one that is symbolic or theatrical. EPIC is an adjective meaning heroic or grand in scale or character. EPOS is a noun meaning a long poem, typically one derived from ancient oral tradition, narrating the deeds and adventures of heroic or legendary figures or the history of a nation. Together, these three words form the phrase ACT HEROIC, which can be interpreted as performing heroic acts or gestures.