"A Study in Scarlet" detective (6)
I believe the answer is:
holmes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a study in scarlet detective</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 holmes that I've seen before include "Champion solver" , "Conan Doyle's creation" , "Conan Doyle's 18" , "Conan Doyle creation" , "Famous detective" .)