Meadow flower (9)
I believe the answer is:
buttercup
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">meadow flower</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 buttercup that I've seen before include "weedy type" , "Common grassland plant, poisonous to livestock" , "Common yellow meadow plant" , "Rich yellow wild flower" , "Common yellow flower" .)