Clue: Grid on an eyepiece

Answer: RETICLE

Length: 7

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Similar Clues:

• The 2x2 black square near the middle of this puzzle's grid, e.g., which is part of eight answers (BLOCK with 5 letters)
• Briefly, one is aptly placed in the grid in the answer to each starred clue (COMPASSPT with 9 letters)
• Last letter in most plurals (but not in this puzzle's six longest answers, which are the only plurals in this grid) (ESS with 3 letters)
• Number of times this puzzle's theme word appears diagonally in the grid (to complete the puzzle, shade those words plus the Down answers that begin where they meet) (FOUR with 4 letters)
• Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers (LBARS with 5 letters)
• Number of F's in this puzzle's answer grid (ONE with 3 letters)
• Annual solving competition held in Brooklyn, briefly ... and a hint to nine squares in this grid (ACPT with 4 letters)
• Using both sides with equal frequency (like the letters in this puzzle's answer grid?) (AMBIDEXTROUS with 12 letters)
• Feature hidden in the starred answers (and suggested by the grid's center) (BLACKANDWHITESANDWICH with 21 letters)
• Attorney General, or what each of six Across answers in this grid literally is (ERICHOLDER with 10 letters)