Small brown bird (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small brown bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for wren that I've seen before include "Very small brown songbird (4)" , "17th Century architect" , "Small bird - great architect" , "Member of the former Women's Royal Naval Service" , "Man of note" .)
(Other definitions for black swan that I've seen before include "Australian native bird" , "Aquatic bird" , "Australian winger" , "Aussie swimmer" .)