Silkworm's protection (6)
I believe the answer is:
cocoon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">silkworm's protection</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 cocoon that I've seen before include "Protective cover of silkworms, etc" , "Protective covering around some animal eggs" , "Silky sheath around a chrysalis" , "Silken sheath" , "Envelop for protection" .)