Prussia's ___ von Bismarck (4)
I believe the answer is:
otto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prussia's von bismarck</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 otto that I've seen before include "Producer of engines" , "Italian for eight" , "perfume maker" , "Palindromic fragrance" , "Rose oil; man's name" .)