Disquisition (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disquisition</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for treatise that I've seen before include "Formal piece of writing on a particular subject" , "Systematically-written formal piece" , "Learned work formally dealing with a subject" , "Learned work on particular subject" , "Written composition" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disquisition</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thesis that I've seen before include "theory" , "Treatise advancing a new point of view resulting from research" , "Learned dissertation" , "Subject" , "writing following research" .)