Dutch bloom (5)
I believe the answer is:
tulip
'dutch bloom' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tulip that I've seen before include "Perennial bulb" , "Bulb producing a single showy flower" , "Spring-flowering bulb" , "Garden flower from bulb" , "Plant of the lily family with a single showy flower" .)