The crossword clue "stop" can have many possible answers depending on the number of letters and the puzzle context. Common answers for "stop" include:

• END (3 letters)
• HALT (4 letters)
• QUIT (4 letters)
• PAUSE (5 letters)
• CEASE (5 letters)
• DESIST (6 letters)
• ARREST (6 letters)
• PREVENT (7 letters)
• TERMINATE (9 letters)

Other variations include synonyms like WAIT, BAR, FREEZE, REST, STANCH, SURCEASE, and DISCONTINUE among others. The word "stop" usually indicates a cessation or end to an action or movement. For shorter answers, "END," "HALT," and "QUIT" are frequently seen in crossword puzzles. For longer answers, "DESIST," "PREVENT," and "TERMINATE" may be appropriate. If you know the number of letters in the answer, that can help narrow down the possible choices for the crossword.