On the wing (2,6)
I believe the answer is:
in flight
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on the wing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for in flight that I've seen before include "Running" , "Trying to get away" , "provided by aircrew?" , "by air" , "Sort of meals, say, for eating up" .)