Some enter a cemetery: a bit of a bloomer (6)
I believe the answer is:
raceme
'a bloomer' is the definition.
'some enter a cemetery a bit' is the wordplay.
'a bit' says the answer is hidden in the clue (the answer is formed by a bit of the clue).
'RACEME' can be found hidden inside 'some enter a cemetery'.
'of' is the link.
(Other definitions for raceme that I've seen before include "Long cluster of flowers on one stem" , "Flowers evenly spaced along central stem" , "Elongated cluster of flowers along a main stem" , "Flower cluster (botany)" , "flower arrangement" .)