The clue "Sleep phase" last appeared in the USA Today crossword on July 12, 2023. The correct answer for this puzzle is "REM", a 3-letter word.
Solution REM is 3 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is REM with 3 letters, and the shortest is REM with 3 letters.
Correct, clue "SLEEP PHASE" is currently one of the top traffic spikes (detected on 27 Dec 2025). Clearly, many find it tricky to solve!
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The solution is 3 letters long.