The clue "Brush up on, as a skill" last appeared in the USA Today crossword on November 27, 2017. The correct answer for this puzzle is "SHARPEN", a 7-letter word.
Solution SHARPEN is 7 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is SHARPEN with 7 letters, and the shortest is SHARPEN with 7 letters.
No, "BRUSH UP ON, AS A SKILL" hasn´t seen a spike right now. Solvers are most interested in: Stance, ___ system (GPS device), Shy, Accuse and Likeness.
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The solution is 7 letters long.