Fortitude
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fortitude</span>' is the definition.<br/ ><span class="explanation-format__explanation">(grit is a kind of fortitude)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for grit that I've seen before include "Small particles of stone or sand" , "called for on icy roads" , "Fragments to sprinkle on roads" , "Hard particles for firmness of character" , "Indomitable courage" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fortitude</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that guts is a type of fortitude)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for guts that I've seen before include "stamina!" , "Courage; entrails" , "Fortitude and determination" , "Pluck - viscera" , "Courage, determination" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fortitude</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for endurance that I've seen before include "ability to survive" , "Ill-fated vessel" , "Lasting nature" , "Crushed ship" , "ship bound for the Antarctic" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fortitude</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for spine that I've seen before include "Vertebral column" , "Thorn" , "Vertebrae, complete" , "Part of a book" , "Part of book's jacket" .)