Clue: Any of seven Chinese puzzle pieces that can form a square

Answer: TAN

Length: 3

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Similar Clues:

• Question asked by a customs officer or a kid on Christmas ... with a hint to this puzzle's circled squares (WHATSINTHEBOXES with 15 letters)
• Confuse—or what to do to four common phrases to form this puzzle's theme answers (ADDLE with 5 letters)
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• The 2x2 black square near the middle of this puzzle's grid, e.g., which is part of eight answers (BLOCK with 5 letters)
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