"Float like a butterfly, sting like a bee" boxer
I believe the answer is:
ali
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">float like a butterfly sting like a bee boxer</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 ali that I've seen before include "Ring' specialist" , "US heavyweight boxer" , "Muhammad - - , legendary boxer" , "Old fighter" , "Muhammad ..., famous boxer" .)