1) Alternative to a thumbtack 2) Bulletin board fastener 3) Bulletin board insert 4) Bulletin board item 5) Drawing pin 6) It may be stuck in a corner 7) Item akin to a thumbtack 8) Paper fastener 9) Tack 10) Tack relative 11) Thumbtack 12) Triviality Found on https://www.crosswordclues.com/clue/pushpin
a short pin having a spool-shaped head of plastic, glass, or metal, used for affixing material to a bulletin board, wall, or the like. · an early children's game. · child's play; triviality. Found on https://www.infoplease.com/dictionary/pushpin