Clue: Apt word to substitute for each of four black squares to make sense of the across answers on either side of them

Apt word to substitute for each of four black squares to make sense of the across answers on either side of them is a crossword puzzle clue that we have spotted 1 time. There are related clues (shown below).

Referring crossword puzzle answers

Likely related crossword puzzle clues

Recent usage in crossword puzzles: