Alexander, to friends (5)
I believe the answer is:
sasha
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">alexander to friends</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 sasha that I've seen before include "Russian boy" , "young man from Russia" , "Possible Russian" .)