1) Aboard 2) In a plane or train 3) In agreement 4) In agreement with the group 5) Loaded 6) Part of the plan 7) Part of the team 8) Participating 9) Participating in a group 10) Participating with the team 11) Ready for takeoff 12) Riding 13) Riding the train 14) Supportive, so to speak 15) Where you show in 7 stud Found on https://www.crosswordclues.com/clue/onboard