1) Altercation 2) Argument 3) Begin 4) Begin earnestly 5) Begin in earnest 6) Begin to work 7) Beginning of a rumble 8) Bench-clearing altercation 9) Bench-clearing brawl 10) Bench-clearing incident 11) Bobbery 12) Bout 13) Brawl 14) Brief argument 15) Brief brawl 16) Brief but heated argument 17) Brief but vigorous fight Found on https://www.crosswordclues.com/clue/set-to