Remembrance flower (5)
I believe the answer is:
poppy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">remembrance 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 poppy that I've seen before include "Remembrance Day flower" , "Cornfield plant" , "Scarlet flower worn in Remembrance" , "Red field flower" , "girl, > rather like Daddy?" .)