Small domestic fowl (6)
I believe the answer is:
bantam
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small domestic fowl</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 bantam that I've seen before include "Boxing weight or feisty fowl" , "Very small - batman (anag)" , "Little clucker" , "Small breed of chicken" , "Domestic fowl; small fighter" .)