Boxing great (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">boxing great</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 ali that I've seen before include "Muhammad --, US boxer" , "Egyptian name" , "Muhammad's son-in-law" , "Muslim name" , "Muhammad - - , legendary boxer" .)