Wrapper (8)
I believe the answer is:
envelope
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wrapper</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that envelope is a type of wrapper)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for envelope that I've seen before include "Rectangular paper container" , "Sheath, wrapping" , "Covering for letter" , "note might be put into this" , "Letter-container" .)