1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) (sports) the chief official (as in boxing or american football) who is expected to ensure fair play 2) a militant organization of irish nationalists who used terrorism and guerilla warfare in an effort to drive british forces from northern ireland and achieve a united independent ireland 3) a thick flat pad used as a floor covering DOWN 1) the shape of a raised edge of a more or less circular object 2) a period marked by distinctive character or reckoned from a fixed point or event 3) a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides) ** Scroll down for solution. ** Are you sure you want to peek? ref ira mat