One means to arrange flowers (8)
I believe the answer is:
anemones
'flowers' is the definition.
(anemone is a kind of flower)
'one means to arrange' is the wordplay.
'to arrange' is an anagram indicator.
'one'+'means'='onemeans'
'onemeans' anagrammed gives 'ANEMONES'.
(Other definitions for anemones that I've seen before include "Plants" , "bloomers" , "One means these flowers, oddly" , "Mean nose (anag.)" , "No enemas for these flowers" .)