Flowers, a drink and pastries (7)
I believe the answer is:
poppies
'flowers' is the definition.
(poppy is a kind of flower)
'a drink and pastries' is the wordplay.
'a drink' becomes 'pop' (pop is a kind of drink**).
'and' says to put letters next to each other.
'pastries' becomes 'pies' (pie is a kind of pastry).
'pop'+'pies'='POPPIES'
(Other definitions for poppies that I've seen before include "Sources of opium" , "Opium-yielding flower plants" , "Large bright flowers" , "Scarlet flowers" .)