School principal (4)
I believe the answer is:
head
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">school principal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for head that I've seen before include "bean" , "See 25" , "Beer foam; front" , "School boss" , "Chief; promontory" .)