Plant with edible flower heads (9)
I believe the answer is:
artichoke
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plant with edible flower heads</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 artichoke that I've seen before include "Thistlelike edible flower head" , "Globe, perhaps" , "Jerusalem, perhaps" , "Edible thistle-like bud" , "Globe vegetable?" .)