Crossword puzzle clue "did a crossword construction duty"

Did a crossword construction duty

Heavy-duty construction lock

Crossword construction, e.g.

Poor crossword construction technique that requires too much of the solver

Crossword writer's construction

Crossword construction, for a very select few

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Actress/singer Helen with the CD "Crossword" (the title track starts "I found my true love today doing the crossword on the back of the 6 train")