1 2 3 1 _ _ _ 2 _ _ _ 3 _ _ _ ACROSS 1) 1/60 of a minute; the basic unit of time adopted under the systeme international d'unites 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) any of various dark heavy viscid substances obtained as a residue DOWN 1) be seated 2) a period marked by distinctive character or reckoned from a fixed point or event 3) a motor vehicle with four wheels; usually propelled by an internal combustion engine ** Scroll down for solution. ** Are you sure you want to peek? sec ira tar