Boxer Carnera (5)
I believe the answer is:
primo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">boxer carnera</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 primo that I've seen before include "top player" , "Principal part of duet" , "... Levi (novelist)" , "Leading role" , "Right-hand part in piano duet" .)