Male swan (3)
I believe the answer is:
cob
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">male swan</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 cob that I've seen before include "Horse, male swan and loaf of bread" , "Hazelnut" , "Round loaf of bread" , "Source of bread" , "A loaf; a nut; a horse" .)