1) Army post fixture 2) Feature of the UN Plaza 3) Pennant mast 4) Pennant-hoisting site 5) Place for Old Glory 6) Range pole 7) Ranging pole 8) Schoolyard sight 9) Sight at post offices 10) Standard bearer 11) Standard holder 12) Surveying instrument Found on https://www.crosswordclues.com/clue/flagpole