Remembrance flower (5)
I believe the answer is:
poppy
'remembrance flower' is the definition.
(I've seen this before)
This is all the clue.
(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?" .)