tipster russian

• информа́тор

  informant, source of information

  informer, snitch, whistle-blower, tipster

  announcer, PA announcer

• наво́дчик

  gun layer, gunner, gun aimer

  tipster (for burglars), inside man, fingerman

  fine finisher, lapper

• наво́дчица

  informer, tipster, accomplice, spotter