Showy flowers (7)
I believe the answer is:
dahlias
'showy flowers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dahlias that I've seen before include "Tuberous Mexican flowers" , "Might Ali dash for the flowers?" , "bloomers" , "Flowers for Shia lad" , "Herbaceous perennial plants of a Mexican genus" .)