Plate shaped like part of bloom (5)
I believe the answer is:
petal
'part of bloom' is the definition.
'plate shaped' is the wordplay.
'shaped' indicates an anagram.
'plate' with letters rearranged gives 'PETAL'.
'like' acts as a link.
(Other definitions for petal that I've seen before include "Colourful flower part" , "A bit of a bloomer" , "part taken from stock?" , "One piece of corolla" , "Part of a flowers corolla" .)