Spinal bone (8)
I believe the answer is:
vertebra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spinal bone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for vertebra that I've seen before include "Bone of spine" , "Segment of the spine" , "Disconcerted" , "One of the small bones of the backbone" , "Joint" .)