Answer:

spina

Answer	Crossword Clue
SPINA	Quill.
SPINA	Thorn: It.
SPINA	Thorn: Lat.

SPINA	Anatomical column
SPINA	Thorn, in old Rome
SPINA	... yarn (tell a story)
SPINA	The backbone, medically
SPINA	Thorn, to Tacitus
SPINA	Caesar's backbone

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.