Meaning of bench-clearing in English:

bench-clearing

noun

North American Sport Baseball
  • The leaving of the bench by all the players, usually to engage in a brawl; an instance of this; in early use also, the sending of a large number of players to the penalty box by the referee or umpire.

adjective

North American Sport Baseball
  • Designating an event, especially a brawl, in which all the players leave the bench.

Origin

1940s.