Watson of the Harry Potter films (4)
I believe the answer is:
emma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">watson of the harry potter films</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for emma that I've seen before include "heroine of novel" , "Flaubert's heroine" , "Ack -, a term for a.m." , "Name of Nelson's Lady Hamilton" , "Girl's name - Jane Austen novel" .)