Carapace (5)
I believe the answer is:
shell
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">carapace</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that carapace can be written as shell)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for shell that I've seen before include "Hard outer covering" , "Hard case; projectile" , "Bit of explosive" , "ammunition" , "See 18" .)