Word: massacred
To kill in considerable numbers where little or no resistance can be made, with indiscriminate violence, without necessity, and contrary to civilized norms. (Often limited to the killing of human beings.)
To win so decisively it is in the manner of so slaughtering one's opponent.
To give a performance so poorly it is in the manner of so slaughtering the musical piece, play etc being performed.
You can find a list of possible crossword clues for MASSACRED below.
Crossword Answers