1) Actor Oliver 2) Actor Oliver of The Big C 3) An on-screen Oliver 4) French girl name 5) Huff Emmy nominee Oliver 6) National park in Okla 7) National Park in Oklahoma 8) Oklahoma national park 9) Oliver of Chicago Med 10) Oliver of stage and screen 11) Tequilla saxophonist Found on https://www.crosswordclues.com/clue/platt
(platform) broad doorstep, landing on stair, cantilevered stone gallery access to tenement flats. (Illustration) Found on http://www.encyclo.co.uk/local/20935