Windflower (7)
I believe the answer is:
anemone
'windflower' is the definition.
(synonyms)
This is all the clue.
(Other definitions for anemone that I've seen before include "Plant of the buttercup family with brightly coloured flowers" , "Tentacled sea dweller, flower" , "Name one strange flower" , "Plant with brightly coloured flowers - found also in sea" , "Plant; sea creature" .)