Is this your crossword clue?
"spine" is also used as a crossword clue. If that's what you saw, the answer is often backbone (8 letters).
Definitions
The backbone, or the bound edge of a book.
Word origin
From late Middle English spyne, from Old French espine (French épine) or its source, Latin spīna (“a thorn; a prickle, spine; the backbone”). Doublet of spina.
Used in a sentence
“If you attentively regard almost any quadruped's spine, you will be struck with the resemblance of its vertebrae to a strung necklace of dwarfed skulls.”
“Trademark Owners will nevertheless try to dictate how their marks are to be represented, but dictionary publishers with spine can resist such pressure.”
“The spine is the book's backbone. Because the spine is generally all you can see when a book is on the shelf, the spine displays the title and author of the book and is often ornately decorated.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Book's bound edge”5 letters
Not quite right?
"Search similar patterns."
S____