The old you? (4)
I believe the answer is:
thou
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the old you?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(historical second person pronoun)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for thou that I've seen before include "Biblical 'you'" , "Second person in the Bible" , "once paired with art" , "You, in olden times" , "Old-fashioned pronoun" .)