Mixture of beer and lemonade (6)
I believe the answer is:
shandy
'mixture of beer and lemonade' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shandy that I've seen before include "Drink made of beer and lemonade" , "Lemonade-beer drink" , "Beer-lemonade mix" , "Beer/lemonade mixture" , "Beer/lemonade drink" .)