This completed puzzle has 10 of them, each three letters long, reading diagonally

Question:

Answer:

HIDDENBODYPARTS

Length:

Similar Crossword Questions:

Long-running game show with a feature spelled out clockwise by this puzzle's circled letters
It uses only the 12 letters A, E, H, I, K, L, M, N, O, P, U and W (like eight long answers in this puzzle)
Any of four long pairs featured in this puzzle
Word or phrase that has no repeated letters (every answer in this puzzle is an example of one)
Nitpick, and what this puzzle's circled letters represent
Chemical reaction phenomenon, and what occurs in four symmetrical pairs of long answers in this puzzle
Street weapon ... or a hint to the circled letters in this puzzle
Second letters of this puzzle's five theme answers (seen in order)
Main thoroughfare in Manhattan (one can be found in each of the four long answers in this puzzle)
City with a landmark spelled out by the circled letters, reading left to right
One place to follow the object named in the circled letters (reading left to right)
Letters featured in this puzzle's theme
Letters for the names "buried" in this puzzle's theme answers
Letters in a British puzzle?
Party snack (and a hint to this puzzle's circled letters)
Classic Dickens title (from whose 10 letters this puzzle was constructed)
Ones whose names are spelled by this puzzle's circled letters ... with representatives of two realms "wrestling" for supremacy
What each completed pair of theme answers in this puzzle is
Number of letters in the shortest answer in this puzzle
How most reading is done, and this puzzle's title
String of letters found in this puzzle's longest Across answers
Feature of six other long answers in this puzzle
Provide recon, and another hint to this puzzle's long answers
How long it takes to get something back (and a hint to this puzzle's theme)
Like long letters from old friends