Crossword puzzle clue "school area workers and what the four pairs of intersecting starred answers depict"

School area workers, and what the four pairs of intersecting starred answers depict

Fixed as a target ... or a hint to four pairs of intersecting answers in this puzzle

They're pairs of pairs of pairs

Massachusetts school ... and a description of the two-word meeting that occurs at the intersections of pairs of starred answers

Chemical reaction phenomenon, and what occurs in four symmetrical pairs of long answers in this puzzle

Each of the four longest puzzle answers has two pairs of them

Diagonally ... or what each of four pairs of puzzle answers form?

Starting a project ... and what the letters between the starting and ending pairs of letters in each starred answer are doing?