1) Commuter 2) Foot-weary citizen 3) Old-fashioned subway standee 4) Public transportation patron 5) Rider on a crowded subway car 6) Subway rider without a seat 7) Subway standee 8) Underground commuter Found on https://www.crosswordclues.com/clue/straphanger
a passenger who stands in a crowded bus or subway train and holds onto a strap or other support suspended from above. · any user of such public transportation. Found on https://www.infoplease.com/dictionary/straphanger