Often-cited distance between things ... or what's hidden in this puzzle

Question:

Length:

Similar Crossword Questions:

Things hidden in this puzzle's eight longest answers
One in business who is no stranger to the elegant things in this puzzle
Hidden item in the theme of this puzzle
Meal blessing that's 'mixed' and hidden in seven answers in this puzzle
Ultimate degree hidden in eight puzzle answers
Cool stuff hidden in eight puzzle answers
Promising words (and what's hidden in this puzzle's four longest entries)
This puzzle's hidden theme
It's ''positively'' hidden four times in this puzzle
One is hidden in each of this puzzle's four longest answers
Director of four films hidden in this puzzle
Award won by lead actors in this puzzle's starred films: the winners' names are hidden "word search"-style in the grid (across, down or diagonally, and forward or backward)
They're hidden in this puzzle's theme entries
Word rearranged and hidden in this puzzle's eight longest answers
Brief version of this puzzle's title hidden in eight long puzzle answers
Stranded at the ski lodge, perhaps, and a hint to this puzzle's hidden theme
They're hidden in this puzzle's seven longest answers
Puzzle title people hidden in eight long answers
Quartet hidden in this puzzle
A different one is hidden in each of this puzzle's seven longest answers
Word for turkey hidden in 11 answers of this puzzle
Apt subject for today that's hidden in this puzzle's four longest answers
Hidden items in this puzzle
1961 #1 hit for Dion, and a literal hint to this puzzle's hidden theme
Show since 12/17/1989 whose five main family members are hidden in this puzzle's other long across answers