1) Detach 2) Detach a medal 3) Loose 4) Loosen 5) Loosen a clasp 6) Release in a way 7) Remove a corsage 8) Remove a diaper 9) Remove a medal 10) Remove an old-time diaper 11) Remove as a brooch 12) Remove as a corsage 13) Remove fasteners 14) Remove fastenings 15) Remove from a bulletin board 16) Remove from the taskbar Found on https://www.crosswordclues.com/clue/unpin