Cabbage genus (8)
I believe the answer is:
brassica
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cabbage genus</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 brassica that I've seen before include "Plant genus including many vegetables" , "Cabbages, cauliflowers etc" , "Plant of cabbage genus" , "Cabbage, say" , "Eg, cabbage, turnip, rape" .)