Pancake mix (6)
I believe the answer is:
batter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pancake mix</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for batter that I've seen before include "Strike hard repeatedly" , "Beat the flour and liquid" , "Make crisp and brown" , "Pasty liquid - paste" , "Strike violently and repeatedly" .)