Removable engine cover (7)
I believe the answer is:
cowling
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">removable engine cover</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 cowling that I've seen before include "Removable engine cover" , "aeroplane's engine casing" .)