Clue: Diamond deception found in this grid nine times: eight in square four-letter clusters, the ninth formed by the clusters' outline

Answer: HIDDENBALLTRICK

Length: 15

---

Similar Clues:

• Former UN leader Hammarskjöld [Note: The circled letters comprise a three-word instruction that, when applied to one square in the completed grid, reveals a group who might follow a code of silence] (DAG with 3 letters)
• Internet interjection found in two theme answers (OMG with 3 letters)
• Today, I tried to put a self-effacing three-letter acronym inside each theme entry. Turns out it works in any order except the one I want. ___ (FML with 3 letters)
• Sidelined by injury, in baseball lingo, and a hint to how this puzzle's theme puns are formed (PUTONTHEDL with 10 letters)
• The pairs of letters inserted into each of this puzzle's theme answers, for example (FASHIONMONOGRAM with 15 letters)
• Internet letters, and a hint to this puzzle's theme (WWW with 3 letters)
• Puzzle theme which appears nine more times in the grid (ABE with 3 letters)
• Postseason gridiron game, and a hint to the puzzle theme found in starred answers (BOWL with 4 letters)
• Landmark inaugurated 3/31/1889 whose shape is suggested by nine squares in this puzzle's completed grid (EIFFELTOWER with 11 letters)
• First of a pair of letters swapped six times in this puzzle's theme entries (ESS with 3 letters)