Actress Watson (4)
I believe the answer is:
emma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">actress watson</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 emma that I've seen before include "Victorian prime minister" , "Ack -, a term for a.m." , "heroine of novel" , "Female" , "It's a girl - ask me ma" .)