Sort of real egg in a mixer (6,3)
I believe the answer is:
ginger ale
'a mixer' is the definition.
(I've seen this in another clue)
'sort of real egg in' is the wordplay.
'sort of' indicates anagramming the letters.
'real'+'egg'+'in'='realeggin'
'realeggin' anagrammed gives 'GINGER ALE'.
(Other definitions for ginger ale that I've seen before include "Fizzy drink" , "Spicy, sweetened non-alcoholic drink" , "One drink" , "pop" , "It won't make you drunk!" .)