Period of tuition (8)
(Other definitions for lesson that I've seen before include "Moral" , "School period" , "Seminar" , "Class session or reading from Bible" , "Unit of instruction" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">period of tuition</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tutorial that I've seen before include "Class" , "Private lesson" , "University lesson" , "Study meeting" , "A period of individual tuition" .)