Answer: clobbers

AnswerCrossword Clue
CLOBBERSWhales the tar out of
CLOBBERSDefeats decisively
CLOBBERSDefeats overwhelmingly: Slang.
clobbersCLOBBER, to thump (to beat with a heavy blow)
clobbersTreat or deal with harshly
clobbersDefeat heavily
clobbersHit (someone) hard