Phrase whose abbreviation is the key to four long puzzle answers

Question:

Answer:

IDEST

Length:

Similar Crossword Questions:

They're hidden in seven long answers in this puzzle
Show since 12/17/1989 whose five main family members are hidden in this puzzle's other long across answers
Puzzle title people hidden in eight long answers
Business term found in eight long puzzle answers
List shortener hidden in eight long puzzle answers
Main thoroughfare in Manhattan (one can be found in each of the four long answers in this puzzle)
Magic words ... or a hint to the other long answers in this puzzle
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
Chemical reaction phenomenon, and what occurs in four symmetrical pairs of long answers in this puzzle
Simple substances split in eight long answers in this puzzle
State short forms strung together in 12 long answers in this puzzle
Workweek start, or an apt title for this puzzle based on an abbreviation found in its five longest answers
Big bank held by 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
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)
Provide recon, and another hint to this puzzle's long answers
Phrase with synonyms starting this puzzle's eight longest Across answers
Reservoir, and hint to puzzle theme found in seven long answers
This weekend's fridge contents, probably, and what's missing from five long puzzle answers?
What the puzzle's long answers all were
Feature of six other long answers in this puzzle
What this puzzle's long answers each have three of
Thought hidden in eight long puzzle answers