The term FINISHES OFF can be broken down into three crossword solutions: ENDS (4 letters), KILLS (5 letters), and USESUP (6 letters). ENDS is a verb meaning to bring or come to a conclusion, while KILLS is a verb meaning to cause the death of. Finally, USESUP is a verb meaning to consume or use up completely. Together, these three words suggest that FINISHES OFF means to bring something to an end, often by causing death or consuming it completely.