Fall flower (5)
I believe the answer is:
aster
'fall flower' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aster that I've seen before include "Christmas daisy" , "Tears (anag) - plant" , "Kind of daisy" , "eg Michaelmas daisy" , "Tears about bright flower" .)