Professorship (5)
I believe the answer is:
chair
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">professorship</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for chair that I've seen before include "Senior academic post" , "What professor has" , "Windsor, for example" , "Something with legs" , "Presiding officer" .)