Jet, say (9)
I believe the answer is:
aeroplane
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jet say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(jet is a kind of aeroplane)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aeroplane that I've seen before include "Flying craft" , "Flying machine" , "What taxis" , "Spitfire, for example" , "Lancaster?" .)