Feature hidden in the starred answers (and suggested by the grid's center)

Question:

Answer:

BLACKANDWHITESANDWICH

Length:

Similar Crossword Questions:

Number of birds hidden in starred-clue answers
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)
Really come down, as illustrated by hidden words in six starred answers
Picnic serving, and when divided properly, a hint to a hidden feature of six pairs of puzzle answers
Different ones are hidden in 12 starred answers
Cyclops feature found at the center of the three longest answers
King, to Juan[LAST WEEK: The hidden name was Claudette Colbert, whose name appears across the grid's center row as CLAW / DEBT / COAL / BEAR.]
Classic ad line, and question you need to answer to find the hidden theme in four starred answers
Where this grid's starred answers' ends have particular relevance
Massachusetts school ... and a description of the two-word meeting that occurs at the intersections of pairs of starred answers
A different one is hidden in each of this puzzle's seven longest answers
Some films, or, academically, what's hidden in the seven starred entries
Explode, and words needed to complete the four starred answers
They're hidden in this puzzle's eight longest answers
Right now, as hidden in this puzzle's longest answers
Medical gp. hidden in 10 puzzle answers
Scholastic mean, briefly, hidden in this puzzle's seven longest answers
They're hidden in this puzzle's six longest answers
Author of the 1974 novel found in the starts of the starred answers
They're hidden in this puzzle's nine longest answers
Feature of six other long answers in this puzzle
Weather Channel feature (it's the puzzle theme found in a quintet of answers)
Roman numeral hidden (in left-to-right order) in the four longest Across answers
Word providing a hint to the hidden theme answers
The word, as suggested by the saying formed by the ends of this puzzle's four longest answers