Building for aircraft (6)
I believe the answer is:
hangar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">building for aircraft</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hangar that I've seen before include "Aircraft accommodation" , "Aircraft shelter" , "Airport building" , "Large building for housing aircraft" , "storage location" .)