Magic formula (5)
I believe the answer is:
spell
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">magic formula</span>' is the definition.<br/ ><span class="explanation-format__explanation">(magic spell)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for spell that I've seen before include "Period (of enchantment?)" , "Charm - recite letters in word" , "influence" , "Formula believed to have magical force" , "Trance" .)