Formula (6)
I believe the answer is:
recipe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">formula</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for recipe that I've seen before include "Instructions on how to cook" , "method for achieving success" , "Cook's instructions" , "Food method" , "Directions for food preparation" .)