Nixon's first veep (5)
I believe the answer is:
agnew
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nixon's first veep</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 agnew that I've seen before include "Spiro -, US VP" , "US vice president" , "US politician" .)