Surround completely (7)
(Other definitions for enclose that I've seen before include "Totally surround" , "Encompass" , "Put inside" , "Cover" , "Fence in (common land)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">surround completely</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 envelop that I've seen before include "Give all-round cover" , "Shroud, cover up" , "Enclose" , "Surround and embrace" , "Cover by wrapping" .)