Not allowed to fly (8)
I believe the answer is:
grounded
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not allowed to fly</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 grounded that I've seen before include "Prevented from flying" , "Not allowed to fly" , "Based; forbidden to fly" , "Punished teenager by confining to house - poor underdog" , "Earthed" .)