John of Salisbury (3)
I believe the answer is:
loo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">john of salisbury</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for loo that I've seen before include "Card game; the 'smallest room'" , "Lavatory - old card game" , "Ladies, perhaps" , "Little boys' room" , "Privy" .)