Baker's mixture (6)
I believe the answer is:
batter
'baker's mixture' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for batter that I've seen before include "Strike violently and repeatedly" , "Mixture of flour, eggs and milk, used in cooking" , "Beat heavily" , "Hit hard and often, like cooking mixture" , "Hit repeatedly" .)