The clue "Up-and-down signals" last appeared in the Newsday.com crossword on November 9, 2017. The correct answer for this puzzle is "nods", a 4-letter word.
Solution NODS is 4 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is NODS with 4 letters, and the shortest is NODS with 4 letters.
No, "UP-AND-DOWN SIGNALS" hasn´t seen a spike right now. Solvers are most interested in: Gunk, Significant, Letters before a phone no., perhaps, Pugilists' org. and Horrible.
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The solution is 4 letters long.