Brunch drink (6)
I believe the answer is:
mimosa
'brunch drink' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mimosa that I've seen before include "Tropical tree with yellow flowers" , "Plant genus popularly extended to the Acacia" , "Type of acacia tree" , "Tropical tree or shrub with clusters of fragrant flowers" , "Variety of acacia" .)