Fliers (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fliers</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pilots that I've seen before include "They fly aircraft and guide ships into harbour" , "Flies" , "Shepherds" , "Airmen" , "They are licensed to fly aircraft" .)
(Other definitions for birds that I've seen before include "Gulls" , "Egg-laying vertebrates" , "Terns and tits, say" , "Feathered fliers" , "4th" .)