1) Become ex-exes 2) Bond, after a time 3) Bring together again 4) Come together again 5) End a split 6) Get back together 7) Get ready for a comeback tour 8) Get the band back together 9) Get the old gang together 10) Get together 11) Get together again 12) Grads often do it 13) Have a reunion 14) Heal the breach Found on https://www.crosswordclues.com/clue/reunite