Spot to find 17-, 22-, 36- and 48-Across

LIBRARY

Think of a quiet place where shelves hold answers to all those numbered references.

This clue hints at a place where you’d find the answers to four other crossword entries (17-, 22-, 36-, and 48-Across). Since those numbered clues likely refer to things like books, reference materials, or sections of a library (e.g., "ATLAS," "FICTION," "PERIODICALS," "DEWEY SYSTEM"), the answer ties them together as a "LIBRARY," the common spot for all of them. The trick is recognizing that the numbered clues share a theme—things you’d typically find in one location.