Missile housing (4)
I believe the answer is:
silo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">missile housing</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 silo that I've seen before include "Farm store; soil (anag.)" , "Underground chamber for a missile" , "Tower for storing grain" , "Grain storage area" , "Storage tower for oils" .)