What this puzzle's long answers each have three of

Question:

Answer:

INS

Length:

Similar Crossword Questions:

Game in which the puzzle's long answers are pieces
Chemical reaction phenomenon, and what occurs in four symmetrical pairs of long answers in this puzzle
Feature of six other long answers in this puzzle
Main thoroughfare in Manhattan (one can be found in each of the four long answers in this puzzle)
They're hidden in seven long answers in this puzzle
Business term found in eight long puzzle answers
Movie good guys responsible for the circled squares in eight long puzzle answers
Speak derisively, and a hint to how this puzzle's long answers were created
List shortener hidden in eight long puzzle answers
Show since 12/17/1989 whose five main family members are hidden in this puzzle's other long across answers
Sweet, or, read another way, a hint to five long puzzle answers
Like the identified car models inside this puzzle's long answers
What each of the four long answers in this puzzle is
Magic words ... or a hint to the other long answers in this puzzle
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)
"Two-way" thoroughfares at both ends of this puzzle's long answers
Thought hidden in eight long puzzle answers
Feature of this puzzle's three long Down answers
Provide recon, and another hint to this puzzle's long answers
Cryptographers' successes (and what can be found in the circles in this puzzle's long answers)
Each of this puzzle's long Across answers sounds like one
Brief version of this puzzle's title hidden in eight long puzzle answers
Simple substances split in eight long answers in this puzzle
What the puzzle's long answers all were
End of a nursery rhyme, or the fate of this puzzle's other three long answers