Nickname for Alexander (5)
I believe the answer is:
sacha
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nickname for alexander</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 sacha that I've seen before include "Boy or girl" , "-- Baron Cohen (Ali G, Borat, etc)" , "Russian fellow" .)