Flightless birds
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flightless birds</span>' is the definition.<br/ ><span class="explanation-format__explanation">(emu is a kind of flightless bird)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for emus that I've seen before include "Running birds" , "laboratory units" , "Aussie birds" , "Largest native Australian birds" , "Muse about flightless Australian birds" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flightless birds</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 penguins that I've seen before include "books" , "E.g. Kings and Emperors" , "Flightless birds of cold regions" , "Flightless birds of Antarctic regions" , "Flightless sea-birds" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flightless birds</span>' is the definition.<br/ ><span class="explanation-format__explanation">(ostrich is a kind of flightless bird)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ostriches that I've seen before include "Fast-running flightless birds" , "Largest living birds" , "People not facing the reality" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">flightless birds</span>' is the definition.<br/ ><span class="explanation-format__explanation">(rhea is a kind of flightless bird)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rheas that I've seen before include "these birds won't fly" , "Ostrich-like birds" , "Flightless birds" .)