Bookworm (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bookworm</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 reader that I've seen before include "University lecturer; book of educational extracts" , "Peruser of text" , "Proof checker" , "One who studies - or his book" , "University lecturer - text book" .)