After that spark, the pair bonded in large ___. Crossword Clue

 The answer to the crossword clue "After that spark, the pair bonded in large ___" is GROUPS. This is a 6-letter word that refers to a number of people or things gathered together.

In the context of the clue, the pair bonded in large groups of people who shared their interests. They went to yoga classes together, joined a hiking club, and volunteered at a local animal shelter. They found that they had a lot in common and that they enjoyed spending time together.

The word "groups" is also a play on the word "grooves." The pair found that they were on the same wavelength and that they could really connect with each other.

I hope this helps!