Compete with me for cluster of flowers (6)
I believe the answer is:
raceme
'cluster of flowers' is the definition.
(I've seen this before)
'compete with me' is the wordplay.
'compete' becomes 'race' (racing is a kind of competing).
'with' says to put letters next to each other.
'race'+'me'='RACEME'
'for' is the link.
(Other definitions for raceme that I've seen before include "flower arrangement" , "Flower cluster (botany)" , "Long cluster of flowers along the main stem" , "Elongated cluster of flowers along a main stem" , "Cluster of flowers along a central stem" .)