1) Ante up 2) Antonym of withdraw 3) Cross the threshold 4) Decide to contribute 5) Enter 6) Gain admission 7) Get past the bouncer 8) Make an entree 9) Obey an Enter sign 10) Pass the bouncer 11) Pass the mat 12) Pass the welcome mat 13) Penetrate 14) Play a hand 15) Proceed 16) Use an entrance 17) Use an entryway Found on https://www.crosswordclues.com/clue/goin