Shrub with showy flowers (6)
I believe the answer is:
azalea
'shrub with showy flowers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for azalea that I've seen before include "Flowering shrub related to rhododendrons" , "Flowering shrub akin to rhododendron" , "Plant with showy flowers" , "Shrub resembling a small rhododendron" , "Flowering plant akin to rhododendron" .)